Preloading of tabs broke at r864

When I use revision 861 of ui.tabs preloading of tabs works perfectly well, but when I use the next version of it (revision 864) my server breaks. The problem occurs both in IE7 and FF3, but I haven't tested it in other browsers.

The comment for revision 864 is: "UI Tabs: fixed tabs select causing page to jump bug, removed cruft form former history integration which will work differently anyway"

I'm using Django. Using Lighttpd with FastCGI, I get this error:

2008-11-18 11:55:59: (connections.c.344) connection closed - read failed: Software caused connection abort 113

Using Django's development server, I get this version:

error: (10053, 'Software caused connection abort')

The strange thing is that this problem doesn't occur when I use setTimeout with a long enough delay, i.e. something like setTimeout(function () { tabs.tabs('load', 1); }, 200);. I'd doubt that this is a problem caused by Django, since it has been tested and used by a vast amount of different web sites and because it uses Python's socket.py which is even further tested.

I will attach the code I'm testing this with, it's very short.