Help fixing a huge windowserver_last.log file

Question

While using Omni Disk Sweeper, I discovered that my windowserver_last.log file is in excess of 8GB in size. I'm not very unix command savvy, but I am trying to reclaim the space without wiping something important. I'm unable to open the file using console because it crashes every time it opens that log. I have looked at the console and it has an error code that posted 25 times in less than a second. I've copied the error code below.
2006-08-27 17:20:46.890 SyndicationAgent[1821] WARNING: BestCalendarDateFromString - can't interpret: 'Sun 27 Aug 2006 12:26:55 -800'
From this, I have posted the last 8 lines of code from the console as well. I have seen that thisw problem was encountered by someone before, but I don't know how to fix it without probably breaking my PB. If anyone can give me some guidance on how to fix it, or let me know if this is normal, thanks.
Jules
2006-08-28 12:04:09.309 SyncServer[2314] A Sync Server is already running on this computer, exiting process.
2006-08-28 13:10:22.293 SyncServer[2333] A Sync Server is already running on this computer, exiting process.
Aug 28 14:02:00 Rene-Juliens-PowerBook-G4 dashboardadivsoryd[2341]: fetch: unable to fetch data from read stream while fetch advisory list
Aug 28 14:02:00 Rene-Juliens-PowerBook-G4 dashboardadivsoryd[2341]: fetch-parsers: unable to fetch data from read stream
Aug 28 18:04:10 Rene-Juliens-PowerBook-G4 configd[37]: SecKeychainFindGenericPassword err= -25308 ( =0xffff9d24, secErrStr=User interaction is not allowed. ) (current= Apple Network ec729f)
2006-08-28 18:07:05.051 Translator[2460] Invoked to sync conduit com.apple.Safari for entityNames: com.apple.bookmarks.Folder,com.apple.bookmarks.Bookmark
Aug 28 18:17:54 Rene-Juliens-PowerBook-G4 configd[37]: SecKeychainFindGenericPassword err= -25308 ( =0xffff9d24, secErrStr=User interaction is not allowed. ) (current= Apple Network ec729f)
Aug 28 18:48:00 Rene-Juliens-PowerBook-G4 configd[37]: SecKeychainFindGenericPassword err= -25308 ( =0xffff9d24, secErrStr=User interaction is not allowed. ) (current= Apple Network ec729f)
1.25 G4 Mirrored Drive Doors   Mac OS X (10.4.5)   1.67 PowerBook G4
1.25 G4 Mirrored Drive Doors   Mac OS X (10.4.5)   1.67 PowerBook G4

Answer 1

Michael,
This is what I got out of Terminal:
<pre>
Rene-Juliens-PowerBook-G4:~ renejulien$ cd /private/var/log
Rene-Juliens-PowerBook-G4:/private/var/log renejulien$ wc -l windowserver.log
274 windowserver.log
Rene-Juliens-PowerBook-G4:/private/var/log renejulien$ grep 0x4623 windowserver.log | wc -l
112
Rene-Juliens-PowerBook-G4:/private/var/log renejulien$ cut -c 18- windowserver.log |sort | uniq -c|sort -n|tail -20
1 [56] kCGErrorIllegalArgument: CGXOrderWindow: Operation on a window 0x1 not owned by caller SecurityAgent
1 [56] kCGErrorIllegalArgument: CGXOrderWindow: Operation on a window 0x5 not owned by caller Mail
1 [56] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x1 not owned by caller SecurityAgent
1 [56] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x5 not owned by caller Mail
1 [56] kCGErrorIllegalArgument: _CGXAddWindowToWindowMovementGroup: Operation on a window 0x5cc not owned by caller QuickEntry DashboardClient
1 [56] kCGErrorIllegalArgument: _CGXAddWindowToWindowOrderingGroup: Operation on a window 0x5cc not owned by caller QuickEntry DashboardClient
1 [56] kCGErrorIllegalArgument: _CGXRemoveWindowFromWindowMovementGroup: Operation on a window 0x5cc not owned by caller QuickEntry DashboardClient
2 [56] Accel caps: 00000003
2 [56] kCGErrorIllegalArgument: CGXOrderWindowList: Empty window list
3 [56] kCGErrorIllegalArgument: CGXGetWindowOwner: Invalid window 0
4 [56] kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Safari" for over 1 second. Server has re-enabled them.
4 [56] kCGErrorIllegalArgument: CGXRemoveTrackingArea: Operation on a window 0x5ca not owned by caller Translation DashboardClient
6 [56] kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Dock" for over 1 second. Server has re-enabled them.
6 [56] kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Finder" for over 1 second. Server has re-enabled them.
8 [56] kCGErrorIllegalArgument: CGXRemoveTrackingArea: Operation on a window 0x5cc not owned by caller QuickEntry DashboardClient
9 [56] kCGErrorIllegalArgument: CGXGetWindowShape: Invalid window -1
50 [56] Hot key operating mode is now all disabled
50 [56] Hot key operating mode is now normal
51 [56] "loginwindow" (0x4623) set hot key operating mode to normal
61 [56] "loginwindow" (0x4623) set hot key operating mode to all disabled
Rene-Juliens-PowerBook-G4:/private/var/log renejulien$
</pre>
For some reason I'm getting the hot keys enabled and disabled, but I don't know what hot key for which program. Any clues or just give up and delete the _last.log file once a month?
Jules