[jQuery] Uncaught exception (Autocomplete / jQuery 1.0.1)

[jQuery] Uncaught exception (Autocomplete / jQuery 1.0.1)

I can't figure out what is causing this, don't know whether it's a bug
in my code, in Firefox or in jQuery.
When I hover over the results of my autocompleter, Firebug reports an error:
uncaught exception: Permission denied to get property HTMLDivElement.parentNode
Detailed steps to reproduce:
Make sure you have Firefox with Firebug
Point Firefox (latest 1.5) to http://www.dyve.net/jquery?autocomplete
Type "com" in the input box and wait for a bunch of birds to appear
Hover your mouse pointer between the input field and the top
result.Move your mouse back and forth between those two. See the
errors appear in Firebug.
Anyone?
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