Can't move cards between columns

[Former user]

Hello,

There seems to have been a regression: I can no longer move cards between columns. I am seeing the issue on Chrome 20.0.1132.57 and Safari 5.1.7 (6534.57.2) on Mac OS X 10.6.8.

Attempting to move cards leads to a small pink error box appearing once the card is dropped in the new column, and the card reappears in its original column.

Thanks,

Dennis Mendelson