Droid 3 Gallery Generating Errorneous Thumbnails; Possibly Due to Infinite Loop, .nomedia glitch?
Please attempt the following:


Delete the entire .thumbnails folder
Delete the /sdcard/Android/data/com.android.gallery3d folder
Go to Settings-&gt;Apps-&gt;All and select the Gallery app. Select clear data.
Go to Settings-&gt;Apps-&gt;All and select the Media Storage app. Select clear data.
Reboot your device.


This will completely erase all data from the gallery app, and if you open it before you reboot you should notice that you have no thumbnails. They will be generated on boot.