Stacked Duplicate Icon & Widget Bug [Fix]
Stacked Duplicate Icon Bug
This bug is usually benign but can effect widget and folder operation. It's easy to fix.
Widgets, Folders and App icons may be duplicates stacked on top of each other. This may effect widget operation and folder contents. It doesn't seem to effect app icons. Some may have more than one duplicate stacked on top of each other.
Discovery and Fix: As you drag an icon to the trash, if an image of the original icon remains as you drag the duplicate toward the trash, it means it is a stacked duplicate. Dump it in the trash and the original icon will remain. Now, try it again to see if another duplicate is stacked. Stop when you drag an icon and it moves with your finger instead of leaving an after image of the original icon.
Note: Duplicate stacked folders may contain different app icons. So copy the duplicate folder to blank area on the screen first and compare the contents of each folder before deleting the one you don't want (usually the "older" duplicate folder).
I don't know what causes this when installing new Roms; perhaps rmk can figure it out.