attachment table causes strange js error

Hi,
I ask for someone else to confirm this bug to make sure it's not just on my installation.

The easiest way to check this is using a node with comments and the comment form on the same page as the node. With webfm enabled you will then see sth. like in webfm1.jpg. Below the textearea you see the unfoldable fieldsets for input format and webfm.

Now you must have anchor somwhere in the page. Most themes should have sth. like <a name="top"/> or sth. Or add a comment, then you can jump to that comment by clicking on its title and will get an url like http://.../blabla#comment-92

You should still see the unfoldable fieldsets. Now click the reload button (or F5 with Firefox/Opera). With all my browsers, I now get what you see in webfm2.jpg. I.e., the fieldsets are not unfoldable anymore (you can see that as the little arrow markers disappeared). See the URL in webfm2.jpg. When I remove the #top part from the URL, the fieldsets are unfoldable again.

This happens because the webfm attachment table starts like this:

  <table id="webfm-attach-list" class="sticky-enable">

As soon as I remove the "sticky-enable" class, the error is gone.

However, when I just put a table like

<table class="sticky-enable">
<thead>
<tr><th>inside th</td></tr>
</thead>
</table>

inside the nodes body and remove the webfm attachment table, the error doesn't happen. So I'm not really sure how this happens, if it is webfm related or a general drupal bug, or maybe just with my setup.

So I would be thankful if anyone else could try this and report.