Twice Today Photoshop CS5 Just Quit During a File - Save As

Question

I've been doing a lot of raw image processing today with Photoshop 12.0.4 64 bit.
On two occasions, after having opened an image through Camera Raw, working on it in Photoshop proper, then attempting a File - Save As so as to save the PSD, Photoshop just quit.  Disappeared.  No error, no warning, no nothing, not even in the Windows Event Logs.  Kind of a PIA when you're finally happy with an image and it dies when you try to save it.  I know I'm not the first to report this; I recall discussing exactly this issue with someone else a few months back.
I narrowed it down to EXACTLY what I was doing in both cases when it quit:
I had chosen File - Save As, and gotten the Save As dialog on the screen.
The default folder wasn't where I wanted to save, which in both cases was C:\TEMP, so I typed exactly the following characters, replacing entirely the filename shown:
C : \ t e m p \
It was instantly upon typing the second backslash in both cases that Photoshop left the building.
When it DOESN'T quit, this is the exact point where normally the Explorer dialog puts up a list of files in that folder, as shown in this screen grab:
Notably I have a LOT of files in that folder.  I haven't cleaned it up in an age, and I guess I should do so on the chance that maybe the list is just so long that someone didn't allocate enough space internally...
Here's a detailed edit log from the second quit:  http://Noel.ProDigitalSoftware.com/ForumPosts/PhotoshopQuitLog.txt
I'm not sure whether it's just the number of files in that folder, the large number of images I'm processing today, something specific I'm running (e.g., HDR Toning), or something that's recently changed that's causing this (for example, I installed ATI's Catalyst 11.9 day before yesterday).
I'm going to reprocess the same image again, and I'll probably do substantially the same things.  I'll add more info to this thread if I see it again.
-Noel

Answer 1

Bah, no more than I typed the above, than I specifically tested the exact same sequence and reproduced the problem again.  This was a relatively short editing sequence.
Notably the current folder the dialog was open to as I was typing the path was the one from which I opened the file, which contains rather a lot of raw image files.  The dialog wasn't showing any of them because the default filename was file type .psd, which didn't match any files in that folder, so while your thoughts about FastPictureViewer maybe working on thumbnails could possibly be pertinent, it seems less likely.
I'm going to try to nail this down to a reproducible set of steps.  Notably, one thing I'm sure I did in all 3 cases, which I don't often do, was a Crop with Perspective checked (and corners moved).
Another thing I did was Image - Adjust - HDR Toning.  I just tried again without doing that and no quit.  Unfortunately, I did HDR Toning and still no quit. 
-Noel