Hey folks, I upgraded to 4.6.0.190/4.0.0.172 before Christmas and I just noticed now that all my camera thumbnails are displaying the same white icon instead of a thumbnail preview of the image. Is there something I need to do to rebuild those thumbnails? Thanks in advance!

It's a known issue with .190. You can either proceed to .216 or downgrade to .185 and the thumbnails will re-appear.