ADT plugin がStackOverFlowError

android eclipse

Androidを趣味でいじる毎日ですが、
昨日、突如として、
layout.xmlをひらくと、以下のエラーがでるようになりました。

java.lang.StackOverflowError
at java.util.HashMap.get(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.configuration.ConfigurationComposite.isTheme(Unknown Source)
・・・（以下繰り返し）

まっさらなeclipseにプラグインを入れただけでも同様のエラーがでるという怪現象です。
Android　SDKの方がおかしくなってるのかな。。。


追記:
プロジェクトが壊れて(?)ましたorz
原因はよくわからないんですが・・・。
おかしいプロジェクトを取り除けば元通り。