I made a xfire client for mac (called BlackFire -> http://www.macxfire.com)
and it keeps using more and more ram over time, even when not doing that much.
I have run the app with instruments::leaks and it doesn’t show any leaks at all (when it did i fixed them quickly).
Somehow it still keeps using more ram, like it is supposed to or something idk.
I have minimized the use of autoreleased objects and I have checked for any leaks using build & analyze with no results.
Get yourself back to Instruments and use Object Alloc to see what objects / allocations are increasing over time.
More likely than not, you have a cache or a log or the like that is simply growing over time… is never being truncated.