Description of problem:
After this update, I am unable to launch Eclipse (worked well before). The splash appears for few seconds, then disappears before the progress bar in it reaches full width. After few seconds, more a small window appears, with 

"An error has occurred. See the log file
/home/afri/Projects/Eclipse/.metadata/.log."

Version-Release number of selected component (if applicable):
Updated     eclipse-equinox-osgi-1:4.2.2-0.4.git20121217.fc18.x86_64
Update                           1:4.2.2-4.fc18.x86_64
Updated     eclipse-jdt-1:4.2.2-0.4.git20121217.fc18.x86_64
Update                  1:4.2.2-4.fc18.x86_64
Updated     eclipse-platform-1:4.2.2-0.4.git20121217.fc18.x86_64
Update                       1:4.2.2-4.fc18.x86_64
Updated     eclipse-swt-1:4.2.2-0.4.git20121217.fc18.x86_64
Update                  1:4.2.2-4.fc18.x86_64

How reproducible:
always

Steps to Reproduce:
1. launch eclipse
  
Actual results:
no-go

Expected results:
happy hacking

Additional info: The mentioned log file says:
!SESSION 2013-03-15 15:11:35.920 -----------------------------------------------
eclipse.buildId=4.2.0.M20130304-1457
java.version=1.7.0_09-icedtea
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Command-line arguments:  -os linux -ws gtk -arch x86_64

!ENTRY org.eclipse.core.resources 2 10035 2013-03-15 15:11:37.744
!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.

!ENTRY org.eclipse.osgi 4 0 2013-03-15 15:11:41.143
!MESSAGE Application error
!STACK 1
java.util.EmptyStackException
	at java.util.Stack.peek(Stack.java:102)
	at java.util.Stack.pop(Stack.java:84)
	at org.eclipse.e4.ui.css.core.impl.sac.CSSDocumentHandlerImpl.endDocument(CSSDocumentHandlerImpl.java:74)
	at org.apache.batik.css.parser.Parser.parseStyleSheet(Parser.java:238)
	at org.eclipse.e4.ui.css.core.impl.dom.parsers.AbstractCSSParser.parseStyleSheet(AbstractCSSParser.java:64)
	at org.eclipse.e4.ui.css.core.impl.engine.AbstractCSSEngine.parseStyleSheet(AbstractCSSEngine.java:180)
	at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:415)
	at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:376)
	at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.setTheme(ThemeEngine.java:369)
	at org.eclipse.e4.ui.css.swt.internal.theme.ThemeEngine.restore(ThemeEngine.java:546)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.initializeStyling(PartRenderingEngine.java:1179)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:945)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:638)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:593)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1447)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1423)