That is weird. For some reason, my Insert key will not paste! The key works, but not in Modplug Tracker for some reason. Has anyone else had this happen with their shortcuts before? How might I fix it? At first, I thought that my Insert key did quit working (when I tested it in Word and it did not seem to do anything), but I tested it in Project 64 (which does not like Vista too much) (especially the Aero interface) (which is changed to Windows Vista Basic) and it worked just fine.
Have you checked the setup->keyboard manager, to see if that shortkey actually exists?
Yep, it exists (and works now as well). It started working after a while, but it was weird when it didn't.