Few reason can be imagined
First one, as I said before, It behavior can be affected from one browser to an other, I can only test with Firefox (2.0 at home and 1.5 at work, both running on debian system).
Second one, func.inc has been modified from beta to SVN version.
I only modify the beta, because, today, the source code of this version is fixed. If the dev team includes it in the project, then it may work in the SVN version, and considered in source code changes.
what behavior do you have with my own server (using demo user?)
Is there the same problem? what browser/system are you running on ?