CS5 Illustrator, InDesign & Photoshop hang frequently

Question

I regularly use Adobe CS5. I have been having for 2-3 months now persistent hangs of InDesign, Photoshop, Illustrator when leaving the software open while working on projects where I access various software in the workflow of the project. While I'm actively using the app there is no problem. But when it is left idle while I'm in other software working, or while away from the computer, when I return to the app to use it again, it is very frequently inoperable due to a hang.
I've looked at the reports and the clues vary. Sometimes it's due to sleep/wake, but many times due to other activity of the system. This doesn't seem to happen to Flash, Dreamweaver or Fireworks. I haven't noticed fonts or font functions being implicated, though I can't rule it out completely. Reports often cite some process like Web Kit or Airport or another Apple component or activity is shown as suddenly unable to complete its task.
When it started, I was running 10.6.4. I've installed updates to 10.6.5 then later to 10.6.6. This doesn't seem to have changed the pattern. It did start happening shortly after I had installed a new Office for Mac 2011, but research I've done doesn't turn up anybody talking about Office affecting Adobe products. Over the time period this has been happening I've gotten several new fonts but I never have all my fonts open. Different fonts are open at different times for different projects, so that aspect is harder to evaluate.
Early on I tried trashing preferences, repairing permissions and other common troubleshooting. I even ran Diskwarrior. No change.
I'm perplexed over this. Would like to fix it, but not sure what could be the cause.

Answer 1

Have been looking through logs inside the System Profiler. In the "kernel.log" I see things that may also be a clue (see below).
(The first two are at the end of a long list of the same on Mar 3, repeating at 30-45 second intervals)
AppleUSBEHCI[0xf573800]::Found a transaction which hasn't moved in 5 seconds on bus 0xfd, timing out! (Addr: 7, EP: 2)
Mar  3 03:37:00 Debbie-Nessamars-Mac-Pro kernel[0]: USBF:          1075317.559          AppleUSBEHCI[0xf573800]::Found a transaction which hasn't moved in 5 seconds on bus 0xfd, timing out! (Addr: 7, EP: 1)
Mar  4 00:15:12 Debbie-Nessamars-Mac-Pro kernel[0]: ALF: ifnet_get_address_list_family error 12
Mar  4 01:35:45 Debbie-Nessamars-Mac-Pro kernel[0]: ALF: ifnet_get_address_list_family error 12
Mar  4 03:47:42 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Switching ON Emergency paging segment
Mar  4 03:47:43 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: System is out of paging space.
Mar  4 03:48:13: --- last message repeated 3 times ---
Mar  4 03:48:56 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Recovered emergency paging segment
From same kernel.log, but occurring earlier, on Mar 1 and 2:
Mar  1 01:19:03 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Switching ON Emergency paging segment
Mar  1 01:19:04 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: System is out of paging space.
Mar  1 01:20:41: --- last message repeated 3 times ---
Mar  1 01:20:41 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Recovered emergency paging segment
Mar  2 02:17:58 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Switching ON Emergency paging segment
Mar  2 02:17:59 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: System is out of paging space.
Mar  2 02:19:17: --- last message repeated 5 times ---
Mar  2 02:19:17 Debbie-Nessamars-Mac-Pro kernel[0]: (default pager): [KERNEL]: Recovered emergency paging segment
Mar  2 19:29:49 Debbie-Nessamars-Mac-Pro kernel[0]: ALF: ifnet_get_address_list_family error 12
Mar  2 19:40:57 Debbie-Nessamars-Mac-Pro kernel[0]: ALF: ifnet_get_address_list_family error 12
Mar  2 20:45:22 Debbie-Nessamars-Mac-Pro kernel[0]: Data/Stack execution not permitted: WebKitPluginHost[pid 44671] at virtual address 0x20ca57000, protections were read-write
From Feb. 19 -
Feb 19 16:54:17 localhost kernel[0]: Warning - com.LaCie.ScsiType00 declares no kernel dependencies; using com.apple.kernel.6.0.
Feb 19 16:54:17 localhost kernel[0]: USBMSC Identifier (non-unique): 5743415A4141343136353836 0x1058 0x1140 0x1007