Question Javascript pop-up error

I and my members are getting the error shownin the screenshot below only in IE 8.

It seems to occur as the mouse pointer goes over the Kunena menu.

Kunena 2.0.0
Joomla 2.5.4

What does more details reveal? The error happens in Mootools library, but could be caused by illegal parameter from Kunena. Or not..

Thanks for the reply Mathias.
The more details simply closes the box with no further information.

I have upgraded my Joomla to 2.5.6 by the way but the same error is still there.

Judging by the design of the JavaScript alert message, this is not only IE8 but this is IE8 on Win XP, yes? Sounds to me that the JavaScript interpreter for IE8 has not been updated to handle the Mootools library for J! 2.5.6. Although the technical specificiations for K 2.0.0 state that Kunena should work for IE8, we have to remember that old, tired, worn-out and has-been Microsoft software just doesn't "cut the mustard" with modern web design these days. As much as we would like to see Kunena work on every browser platform that people could possibly imagine, the project is constrained by the cross-browser compatibility code - handled by JavaScript - available in Joomla. In this case, it's what is available in Mootools.

What do the Mootools developers have to say about J! 2.5.6 on IE8 under WinXP?

I mean, we have to acknowledge that even Microsoft doesn't support IE8 these days, let alone does it not support WinXP! :whistle:

I've read that there are many issues with IE and it's backward compatibility modes. By changing some of the IE settings, issue may go away. Have you tried to use IE8 in more than one computer?

Yes and the problem occurs in IE9 as well.

One point which I should have mentioned is that the upgrade failed and I had to copy over some Kunena files manually.

Is there a was that I can upcompress Kunena 2.0.1 and manually upload and overwrite the files?

Can one of you possibly take a look at my www.buzz50.com site in IE8 for me?

Thnaks,
Mike