This has been discussed here several times. I doubt that it is the "fold to any bet" box in all these cases. I know it wasn't the two or three times it happened to me.
Party's response is to turn off graphics optimization, or something like that.
Here's a couple of threads, there have been more, but they're difficult to search for:
http://archiveserver.twoplustwo.com/show...o=14&fpart=
http://archiveserver.twoplustwo.com/show...4&fpart=all
http://forumserver.twoplustwo.com/sh...p;Main=3011724
Enjoy!