LR 2.4 crashing on 500d cr2 files - CameraRaw!CTJPEGRotateImage

Question

LR 2.4 is consistently crashing while viewing cr2 files from a Canon 500d / T1i.  I've just recently started using LR, but unfortunately it crashes so frequently (within a minute or two) that I haven't made it much past just importing my photos and starting to add keywords and delete rejects.  I'm curious if anyone else is running into this type of issue.  At this point my only real option is to give up on LR (just use DPP and then PS CS4) or perhaps try it on another PC in hopes that there's some incompatibility/problem on this specific box. . .  I hate to do this as we have LR licenses at work already plus I'd love to purchase it for home use as well. . .
Environment:
Windows XP x64 SP2
LR DB on local NTFS
CR2 files on mapped network drive.
See Dr. Watson below for more. . .
Steps to reproduce:
  Do a couple of the following actions (all in the Library module):
    Select imags and add keywords in grid view
    Zoom in and out on a couple of images
    Switch folders and repeat the first couple of steps
Usually I get crashes by doing this within a minute or two and by manipulating about 20-50 files (so very quickly).
Here is some of my exception information (access viloation exception)
Microsoft (R) DrWtsn32
Copyright (C) 1985-2002 Microsoft Corp. All rights reserved.
Application exception occurred:
        App: C:\Program Files (x86)\Adobe\Adobe Photoshop Lightroom 2.4\lightroom.exe (pid=2464)
        When: 7/10/2009 @ 00:36:34.343
        Exception number: c0000005 (access violation)
*----> System Information <----*
        Computer Name: IGRAINE
        User Name: dath
        Terminal Session Id: 0
        Number of Processors: 2
        Processor Type: AMD64 Family 15 Model 107 Stepping 2
        Windows Version: 5.2
        Current Build: 3790
        Service Pack: 2
        Current Type: Multiprocessor Free
<SNIP, SNIP>
Several threads look similar to this backtrace (I can post up a full dump/Dr. Watson for support if they're interested...):
*----> Stack Back Trace <----*
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\syswow64\kernel32.dll -
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files (x86)\Adobe\Adobe Photoshop Lightroom 2.4\CameraRaw.dll -
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\system32\PSAPI.DLL -
ChildEBP RetAddr  Args to Child             
WARNING: Stack unwind information not available. Following frames may be wrong.
002dd1cc 7d4d8c0d 00000348 00000064 00000000 ntdll!NtWaitForSingleObject+0x15
002dd1e0 605a161f 00000348 00000064 002dd564 kernel32!WaitForSingleObject+0x12
09f86310 ffffffff 00000000 00000000 00000000 CameraRaw!CTJPEGRotateImage+0x14e2f
0fef0328 09f86310 0fef0358 0fef0f60 00000000 0xffffffff
00000000 00000000 00000000 00000000 00000000 0x9f86310
Thanks!
-dath

Answer 1

Just for reference, my LR database is on my local disk, not on my network drive.  I have no issues using this network share with any other programs (such as DPP or Explorer).
I have all of the latest updates available from MS update, including the latest video driver from their site for my Nvidia 7900GS.  I'll check the Nvidia site and see if there are any other (newer) drivers available directly from them.
It has been a long while since I've done anything with RAW files, so this is really in all practicality my first experience and definitely so on this PC (I had a Canon G1, so yeah, a *long* time;->).  I probably have some older G1 raw files around I could try working with as well if messing with the video drivers doesn't make any difference.
I'll make some adjustments and get back to folks with results, thanks for the suggestions so far!
-dath