From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.1+) Gecko/20010618 BuildID: 2001061804 Applies to builds post-0.9 (0.9 worked correctly): It is not possible to set custom properties of an HTML <select> field object, ie. document.formName.selectName.customProperty="string"; An uncaught exception error is thrown in the JS console. Setting custom properties on other types of fields works correctly. Testcase will be attached.
Sounds like an xpcdom problem.... Seeing this on Linux with 2001-06-17-21 as well.
*** Bug 86672 has been marked as a duplicate of this bug. ***
Fixed by my DOM array checkin last night.
Verified fixed. Thanks jst!