Mac OSX 10.5 New install crashes periodically

All I've been able to detect thus far are a series of messages in the console log:

> 1/19/11 11:24:48 AM org.x.startx[541] AllocNewConnection: client index = 3, socket fd = 12  
> 1/19/11 11:24:48 AM org.x.startx[541] AUDIT: Wed Jan 19 11:24:48 2011: 602 X: client 3 rejected from local host (uid 506) 
> 1/19/11 11:24:48 AM org.x.startx[541] Xlib: connection to ":0.0" refused by server
> 1/19/11 11:24:48 AM org.x.startx[541] Xlib: No protocol specified
> 1/19/11 11:24:48 AM org.x.startx[541] .
> 1/19/11 11:24:49 AM org.x.startx[541] .
> 1/19/11 11:24:50 AM org.x.startx[541] giving up.
> 1/19/11 11:24:50 AM org.x.startx[541] xinit:  Operation timed out (errno 60):  unable to connect to X server
> 1/19/11 11:24:50 AM org.x.startx[541] waiting for X server to shut down
> 1/19/11 11:24:51 AM org.x.startx[541] Quitting Xquartz...
> 1/19/11 11:24:51 AM com.apple.launchd[120] ([0x0-0x25025].org.wireshark.Wireshark[499]) Stray process with PGID equal to this dead job: PID 709 PPID 1 dumpcap-bin 
> 1/19/11 11:24:51 AM org.x.startx[541] xinit:  Operation timed out (errno 60):  Server error.

Am running XQuartz 2.1.6 (xorg-server 1.4.2-apple33), which works with many other applications I run frequently on this Mac, I believe this came from the latest install I made of Xcode.

Suggestions, please?

Jon