IE staves that fire a constant stream such as the staff of Magnus? To clarify - when constant-effect staves are fired it halts magicka regen the same as a spell would. I find it a bit annoying that a staff that's so perfect for mages (at least for roleplaying purposes) is offset by the fact that it not only doesn't replenish magicka but prevents its regenration.
Sorry if this has been covered. I've been away from the beth forums for a while but I did do a search for the issue before posting.