I remember a post about this but I can tfind it so here goes again. When I have my A/C on and I change gears my RPM's seem to stay up and not drop at all when the A/C is on. If the A/C is off it is normal. It wasnt doing it as bad today but it was doing it alot yesterday.

I also noticed this, too, but never really thought about. I wonder if it has something to do with manifold pressure or vacuum; with the A/C on, the vacuum will read 1-2 in Hg less than normal.