Checking memory allocation in Instruments

I've cleared my app of leaks using the leaks tool, but I still notice that the objectalloc tool jumps up in the number of objects allocated and footprint when I switch views.

I'm especially seeing high numbers of:

GeneralBlock-16 with mostly Foundation responsible with caller NSLogv

and

GeneralBlock-0 with mostly QuartzCore responsible

Any tips on what I can do to further debug this?

Thanks!