I countered this bug too. It also occurs with jQuery 1.4.1. Here's a patch which fixes the problem; it appears that the author renamed 'newPosition' to 'position' and forgot to update that piece of code.
I countered this bug too. It also occurs with jQuery 1.4.1. Here's a patch which fixes the problem; it appears that the author renamed 'newPosition' to 'position' and forgot to update that piece of code.