Hi, I have just had a similar problem - this actually happens only with IE6, IE7 is fine. I was able to work around it by removing the umlauts "ÄÖÜ" from the Validate plugin regex. I'm suspecting this happens when the page is UTF8-encoded, which is the case with your page and the page where I experienced it. I'm working hard on a project right now, so I could not yet investigate further...
Bernd
