I'm running Tortoise CVS 1.10.10 (with CVS NT 2.5.03) on Win 7 x64, and my folder overlay icons won't appear.
I don't remember when this happened, however I've a colleague running the same setup (also Win 7, x64) and his icons appear just fine.
I've tried installing the latest release of Tortoise CVS (1.12.4) however this version produced a missing iconv-x-x-x.dll error when trying to run 'cvs.exe' commands (and didn't display any overlay icons either).
I have set the overlay icons setting in Tortoise CVS preferences to no avail. I can check in and checkout just fine.