jqTransform checkbox Click Problem with IE

jqTransform checkbox Click Problem with IE

Dear jQuery Profs, hope that someone is familiar with this curious behaviour of the ie:

After jqTransform (-ation) only the first click on a Checkbox is shown, after that it ever needs 2 clicks to unmark the checkbox and 2 clicks to mark it again. In FF its working as it should be.

Would be very thankful for some hints...