ActionBar drawable background inconsistency

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http://stackoverflow.com – I have successfully set a background image on an Action Bar. I use ActionBarSherlock and in Android 2.x everything is ok. The problem is with Android 4.x. The background image change across activities. If I set the background to a solid colour, the looks is the same for all activities. If a set a drawable, sometimes it is lighter others darker. My style file in values-14 <style name="AppBaseTheme" parent="android:Theme.Holo.Light"> <item name="android:actionBarStyle">@style/ActionBarBG</item> </style> <style name="ActionBarBG" parent="android:Wid (HowTos)