[iMac] anybody notice 104.7 wedging up on Intel iMac?

[Steve Goldstein]

I have been experiencing what behaves like memory leaks and failure 
of the OS to reclaim memory with consequent freezing of processes 
(apps, dock, whatever) and the need to restart.  Restart cures the 
problem, until the next time.

I have an Apple Certified refurbished 20" iMac with 2 GB of RAM and a 
lightly populated 500 GB HD (whoever owned the iMac before I got it 
really tricked it out to the max!).  I often have 10 applications 
open at any one time.  But, this did not happen under similar 
circumstances with my G4 Quicksilver running 10.4.7, so I am inclined 
to believe that memory management might not have fully matured in OS 
X for the Intel Macs.

Anybody have similar experiences?  Ideas?

Thanks,

Steve