Android : Eclipse ADT running out of memory and keeps crashing?

I've been using ADT for a while now and things have been going smoothly enough. All of a sudden, Eclipse declares that it's short on memory "Java heap space" troubles and whatnot... I've searched all over and every piece of advice seems to point to editing the file eclipse.ini.

Most of the advice said to turn the memory up to 512m. I did that, but it wasn't fixing anything. So I upped it to 1024m. Still no luck, so I upped it again to 2048m. Still no success! My eclipse.ini now looks like this:

-showsplash
org.eclipse.platform
-startup
../../../plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
../../../plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_1.1.200.v20120913-144807
-product
com.android.ide.eclipse.adt.package.adtproduct
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
1024m
--launcher.defaultAction
openFile
-vmargs
-Xdock:icon=../Resources/Eclipse.icns
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts
-Dosgi.requiredJavaVersion=1.6
-XX:MaxPermSize=1024m
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts
-Xms1024m
-Xmx2048m
-Xdock:icon=../Resources/Eclipse.icns
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts

ADT still crashes. It seems like 2048m should be plenty of memory already, but ADT still complains about it. So is there another problem that could be prompting this symptom? Keep in mind that my app was working just fine minutes before the IDE started going bonkers.