I started experiencing the following error on a MacBook Pro retina 13" with 8GB RAM and OSX 10.9.1 running Photo Mechanic Version 5.0, build 15277 (0ebcc6a):
I have a Contact sheet with about 800 images about 167 images of them tagged. However if I hit CMD+T to select all the tagged images, only about a dozen of them are selected. If I scroll down on the contact sheet and hit CMD+T again another bunch of the tagged photos get selected, but yet again not all of the tagged images.
Probably the error may be connected to loading image thumbnails and other information being loaded as I scroll down the window. If I hit F3 to show only tagged photos only the tagged ones appear and after hitting F1 CMD+T seems to work as expected without any problem.