I am using the VS keymap in ReSharper 6 (6.0.2202.688) and the Find Usages shortcut (Shift+F12) does not work.
If I switch to the IDEA keymap the shortcut (Alt+F7) works fine.
Switching back to the VS keymap didn't fix the problem. I've even gone into Tools | Options | Environment | Keyboard and reset the VS keyboard mapping (and then applied the VS keymap). All to no avail.
I've had to manually set the shortcut for "ReSharper.ReSharper_FindUsages". Now it works.
Is this an "undocumented feature" with ReSharper?