I've got two NVIDIA GTX 480 cards installed in my Windows 8 PC with the latest beta driver installed (through Geforce experience).  I was hoping to try out Litecoin mining, but every time I run it I get a debug pop-up right after the autotune process happens and cudaminer declares a kernel to use.  I'll copy/paste it in here (with minor edits to clear the machine specific stuff) in case it helps diagnose the issue.

cudaminer -D -H 1 -i 1,0 -o stratum+tcp:// -O :

...
[2013-11-06 20:38:56] 353:     |     |     |     |     |     |     |     |     |     |     |     |
   |     |     |      kH/s
[2013-11-06 20:38:56] 354:     |     |     |     |     |     |     |     |     |     |     |     |
   |     |     |      kH/s
[2013-11-06 20:38:56] GPU #0:   71.63 khash/s with configuration F7x8
[2013-11-06 20:38:56] GPU #0: using launch configuration F7x8

I was hoping to get help before posting an issue on github.