Mac Keeps Crashing after sleep

Question

I have a brand new iMac.
It works perfectly, except that it crashes after waking it from sleep. Not always, but frequently enough to be quite annoying. I initially thought this was due to network hardware I had installed for a network storage drive, but I have since uninstalled it, and it did not fix the problem.
I will wake if from sleep, it will work for about 30 seconds, then the screen will turn pink (or white, or gray) and it will freeze. Sometimes this will happen when I have pressed no keys. Sometimes this will happen when I go to start a program.
I called the support line, and they had me do a hardware reset (holding Command, Option, P, R while starting.) But this did not fix the problem.
If I set my computer never to sleep, I have no problems.
I am trying to avoid bringing my iMac back to the Apple store. I read a post once where a person said this occurred because of a wireless router problem. Has anyone heard of this as a cause? I am using a Lynksys, but was thinking of getting Apple's Time Capsule anyway, and will do so now if this would fix the problem. Does anyone know if this might fix the problem?
If it is any help, this is the error message I always get in Console Messages:
12/19/10 11:05:10 AM apsd-ft[146] <APSCourier: 0x100609db0>: Stream error occurred for <APSTCPStream: 0x102f02bf0>: Error Domain=NSPOSIXErrorDomain Code=57 UserInfo=0x102f01480 "The operation couldn’t be completed. Socket is not connected"
12/19/10 11:05:10 AM apsd-ft[146] <APSCourier: 0x100609db0>: Stream error occurred for <APSTCPStream: 0x102f02bf0>: Error Domain=kCFErrorDomainCFNetwork Code=2 UserInfo=0x102e29c10 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)"
Any advise appreciated, thanks.
-Lee

Answer 1

I could not find any kernal panics in the console list, but I did figure out the problem.
Apparently, network storage devices can be problematic if the iMac sleeps, and they do not support sleep. I have since purchased a Time Capsule as my router, and now have my network storage device plugged into this. Actually, my router could have been the problem also, as it does also serve as network storage.
For anyone who reads this who has problems with the iMac crashing after sleep, consider what network storage devices might be connected.
-Lee