offset() adds ovreflow width on IE in right-to-left layout

[itsadok]

The example shown here works fine in Firefox but not in IE7.

Notes:
* The example uses "left: -100px" as a style. This is usually done to hide form input elements and still be able to submit them in IE.
* The same bug occurs if overflow is caused by a long string.
* Without the "direction: rtl" style there is no problem.