diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
--- a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml	Fri May 20 16:00:36 2011 -0400
@@ -20,8 +20,112 @@
    height="12"
    layout="topleft"
    left="33"
+   name="Cache:"
+   top_pad="10"
+   width="100">
+    Cache:
+  </text>
+  <spinner
+   control_name="CacheSize"
+   decimal_digits="0"
+   follows="left|top"
+   height="23"
+   increment="64"
+   initial_value="1024"
+   label="Cache size (64 - 9984MB)"
+   label_width="150"
+   layout="topleft"
+   left="80"
+   max_val="9984"
+   min_val="64"
+   top_pad="10"
+   name="cachesizespinner"
+   width="200" />
+  <text
+   type="string"
+   length="1"
+   follows="left|top"
+   height="23"
+   layout="topleft"
+   left_pad="5"
+   mouse_opaque="false"
+   name="text_box5"
+   width="20">
+    MB
+  </text>
+  <button
+   follows="left|top"
+   height="23"
+   label="Clear Cache"
+   label_selected="Clear Cache"
+   layout="topleft"
+   left_pad="30"
+   name="clear_cache"
+   top_delta="0"
+   width="100">
+  <button.commit_callback
+   function="Pref.ClearCache" />
+  </button>
+  <text
+   type="string"
+   length="1"
+   follows="left|top"
+   height="10"
+   layout="topleft"
+   left="80"
+   name="Cache location"
+   top_pad="5"
+   width="300">
+    Cache location:
+  </text>
+  <line_editor
+   control_name="CacheLocationTopFolder"
+   border_style="line"
+   border_thickness="1"
+   follows="left|top"
+   font="SansSerif"
+   height="23"
+   layout="topleft"
+   left="80"
+   max_length="4096"
+   name="cache_location"
+   top_pad="5"
+   width="205" />
+  <button
+   follows="left|top"
+   height="23"
+   label="Browse"
+   label_selected="Browse"
+   layout="topleft"
+   left_pad="5"
+   name="set_cache"
+   top_delta="0"
+   width="100">
+  <button.commit_callback
+   function="Pref.SetCache" />
+  </button>
+  <button
+    follows="left|top"
+    height="23"
+    label="Default Location"
+    label_selected="Default Location"
+    layout="topleft"
+    left_pad="3"
+    name="default_cache_location"
+    top_delta="0"
+    width="100">
+    <button.commit_callback
+     function="Pref.ResetCache" />
+  </button>
+   <text
+   type="string"
+   length="1"
+   follows="left|top"
+   height="12"
+   layout="topleft"
+   left="33"
    name="UI Size:"
-   top_pad="25"
+   top_pad="20"
    width="100">
     UI size:
   </text>
diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/skins/default/xui/en/panel_preferences_setup.xml
--- a/indra/newview/skins/default/xui/en/panel_preferences_setup.xml	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/skins/default/xui/en/panel_preferences_setup.xml	Fri May 20 16:00:36 2011 -0400
@@ -93,98 +93,6 @@
    name="connection_port"
    top_delta="3"
    width="170" />
-  <text
-   type="string"
-   length="1"
-   follows="left|top"
-   height="10"
-   layout="topleft"
-   left="80"
-   mouse_opaque="false"
-   name="cache_size_label_l"
-   top_pad="20"
-   width="200">
-    Cache size
-  </text>
-  <slider
-   can_edit_text="true"
-   control_name="CacheSize"
-   decimal_digits="0"
-   follows="left|top"
-   height="15"
-   increment="16"
-   initial_value="1024"
-   layout="topleft"
-   left_delta="150"
-   max_val="10240"
-   min_val="32"
-   name="cache_size"
-   top_delta="-2"
-   width="180" />
-  <text
-   type="string"
-   length="1"
-   follows="left|top"
-   height="10"
-   layout="topleft"
-   left_pad="6"
-   mouse_opaque="false"
-   name="text_box5"
-   top_delta="1"
-   width="40">
-    MB
-  </text>
-  <text
-   type="string"
-   length="1"
-   follows="left|top"
-   height="10"
-   layout="topleft"
-   left="80"
-   name="Cache location"
-   top_delta="20"
-   width="300">
-    Cache location:
-  </text>
-  <line_editor
-   control_name="CacheLocationTopFolder"
-   border_style="line"
-   border_thickness="1"
-   follows="left|top"
-   font="SansSerif"
-   height="23"
-   layout="topleft"
-   left="80"
-   max_length="4096"
-   name="cache_location"
-   top_pad="5"
-   width="205" />
-  <button
-   follows="left|top"
-   height="23"
-   label="Browse"
-   label_selected="Browse"
-   layout="topleft"
-   left_pad="5"
-   name="set_cache"
-   top_delta="-1"
-   width="100">
-    <button.commit_callback
-     function="Pref.SetCache" />
-  </button>
-  <button
-    follows="left|top"
-    height="23"
-    label="Reset"
-    label_selected="Reset"
-    layout="topleft"
-    left_pad="3"
-    name="reset_cache"
-    top_delta="0"
-    width="100">
-    <button.commit_callback
-     function="Pref.ResetCache" />
-  </button>
 
   <text
          type="string"
diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/skins/default/xui/en/notifications.xml
--- a/indra/newview/skins/default/xui/en/notifications.xml	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/skins/default/xui/en/notifications.xml	Fri May 20 16:00:36 2011 -0400
@@ -4763,6 +4763,18 @@
      notext="Cancel"
      yestext="OK"/>
   </notification>
+  
+  <notification
+   icon="alertmodal.tga"
+   name="ConfirmClearCache"
+   type="alertmodal">
+Are you sure you want to clear your viewer cache?
+    <tag>confirm</tag>
+    <usetemplate
+     name="okcancelbuttons"
+     notext="Cancel"
+     yestext="OK"/>
+  </notification>
 
   <notification
    icon="alertmodal.tga"
diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/llappviewer.cpp
--- a/indra/newview/llappviewer.cpp	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/llappviewer.cpp	Fri May 20 16:00:36 2011 -0400
@@ -3586,10 +3586,12 @@
 	// Init the texture cache
 	// Allocate 80% of the cache size for textures	
 	const S32 MB = 1024 * 1024;
+	const S64 MIN_CACHE_SIZE = 64 * MB;
+	const S64 MAX_CACHE_SIZE = 9984ll * MB;
+	const S64 MAX_VFS_SIZE = 1024 * MB; // 1 GB
+
 	S64 cache_size = (S64)(gSavedSettings.getU32("CacheSize")) * MB;
-	const S64 MAX_CACHE_SIZE = 10 * 1024ll * MB;
-	const S64 MAX_VFS_SIZE = 1024 * MB; // 1 GB
-	cache_size = llmin(cache_size, MAX_CACHE_SIZE);
+	cache_size = llclamp(cache_size, MIN_CACHE_SIZE, MAX_CACHE_SIZE);
 
 	S64 texture_cache_size = ((cache_size * 8) / 10);
 	S64 vfs_size = cache_size - texture_cache_size;
diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/llfloaterpreference.h
--- a/indra/newview/llfloaterpreference.h	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/llfloaterpreference.h	Fri May 20 16:00:36 2011 -0400
@@ -88,7 +88,8 @@
 	void		onBtnCancel();
 	void		onBtnApply();
 
-	void		onClickBrowserClearCache();
+	void		onClickClearCache();			// Clear viewer texture cache, vfs, and VO cache on next startup
+	void		onClickBrowserClearCache();		// Clear web history and caches as well as viewer caches above
 	void		onLanguageChange();
 	void		onNameTagOpacityChange(const LLSD& newvalue);
 
@@ -99,7 +100,7 @@
 	void onChangeCustom();
 	void updateMeterText(LLUICtrl* ctrl);
 	void onOpenHardwareSettings();
-	/// callback for defaults
+	// callback for defaults
 	void setHardwareDefaults();
 	// callback for when client turns on shaders
 	void onVertexShaderEnable();
diff -r 72084f785685 -r 62f84fc9d5f7 indra/newview/llfloaterpreference.cpp
--- a/indra/newview/llfloaterpreference.cpp	Fri May 06 15:25:12 2011 -0400
+++ b/indra/newview/llfloaterpreference.cpp	Fri May 20 16:00:36 2011 -0400
@@ -187,12 +187,26 @@
 void handleNameTagOptionChanged(const LLSD& newvalue);	
 void handleDisplayNamesOptionChanged(const LLSD& newvalue);	
 bool callback_clear_browser_cache(const LLSD& notification, const LLSD& response);
+bool callback_clear_cache(const LLSD& notification, const LLSD& response);
 
 //bool callback_skip_dialogs(const LLSD& notification, const LLSD& response, LLFloaterPreference* floater);
 //bool callback_reset_dialogs(const LLSD& notification, const LLSD& response, LLFloaterPreference* floater);
 
 void fractionFromDecimal(F32 decimal_val, S32& numerator, S32& denominator);
 
+bool callback_clear_cache(const LLSD& notification, const LLSD& response)
+{
+	S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
+	if ( option == 0 ) // YES
+	{
+		// flag client texture cache for clearing next time the client runs
+		gSavedSettings.setBOOL("PurgeCacheOnNextStartup", TRUE);
+		LLNotificationsUtil::add("CacheWillClear");
+	}
+
+	return false;
+}
+
 bool callback_clear_browser_cache(const LLSD& notification, const LLSD& response)
 {
 	S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
@@ -305,7 +319,7 @@
 	mCommitCallbackRegistrar.add("Pref.Cancel",				boost::bind(&LLFloaterPreference::onBtnCancel, this));
 	mCommitCallbackRegistrar.add("Pref.OK",					boost::bind(&LLFloaterPreference::onBtnOK, this));
 	
-//	mCommitCallbackRegistrar.add("Pref.ClearCache",				boost::bind(&LLFloaterPreference::onClickClearCache, this));
+	mCommitCallbackRegistrar.add("Pref.ClearCache",				boost::bind(&LLFloaterPreference::onClickClearCache, this));
 	mCommitCallbackRegistrar.add("Pref.WebClearCache",			boost::bind(&LLFloaterPreference::onClickBrowserClearCache, this));
 	mCommitCallbackRegistrar.add("Pref.SetCache",				boost::bind(&LLFloaterPreference::onClickSetCache, this));
 	mCommitCallbackRegistrar.add("Pref.ResetCache",				boost::bind(&LLFloaterPreference::onClickResetCache, this));
@@ -809,6 +823,11 @@
 	}
 }
 
+void LLFloaterPreference::onClickClearCache()
+{
+	LLNotificationsUtil::add("ConfirmClearCache", LLSD(), LLSD(), callback_clear_cache);
+}
+
 void LLFloaterPreference::onClickBrowserClearCache()
 {
 	LLNotificationsUtil::add("ConfirmClearBrowserCache", LLSD(), LLSD(), callback_clear_browser_cache);