holidayboy:Did the avi problem just appear or has it always been there (could it be linked with the tv show problem)?
I think the problem is normally put down to graphics card drivers and the different directx mode and overlay stuff that going fullscreen uses.
Does the same thing happen with mpg or wmv files?
Which codecs are you using for the avi files?
Which graphics card drivers are you using and have you tried different ones (older as well as newer) ?
Maybe worth trying a full uninstall of the catalyst software and uninstall the card from in device manager - delete the driver if you get the option.
Then reboot and install catalyst again.
Did you see this thread:
http://thegreenbutton.com/forums/thread/337105.aspx
i believe that it's always been there, in the past i've mostly not used media center but just used media player (in full screen), i think i started doing that because of that problem.
i just recently installed new catalyst driver but it's the same either way.
i noticed today that it does it during the intro screens to dvd's, but not the movie itself.
some avi's work fine, mp4 (divx5) jitters, but mp4 (divx3) does not, it's the toons i have that mostly do it, i think
i have only sharky's vista codec pack, and 64bit extras, installed on a clean install of vista, which works near perfectly for me for everything else.
thanks,
rlr