if your using the built in app2sd it only partially moves the app. Instead partition your SD card with something like mini tool partition manager (its free) and you do not have to format, it partitions on the fly, make a 300mb or 500mb fat 32 partition after your main fat32 partition, then install link2sd it will let you move all but core system apps to the sd partition and it fully moves them. You can then set it to auto move any future app as well and updates. It works well, small overhead and it frees ALOT of memory that you need to run GB roms.
P.S. after you install it, you need to move all the froyo app2sd moved apps back to internal before it can move them to the partition section.
my .02 worth