This errors occurs only randomly and is also
repeatable in the fresh installation of the template.
it only seems to happen with firefox.

Do you have a clue how to solve that problem?

s1.directupload.net/file/d/3310/7vbrcrmw_jpg.htm

Hello,

You should submit your site url here so we can check that error.

Regards

www.aufzug-roesler.de/joomla3/

move and klick on kundendienst and partner and
inbetween move over Produkte|Leistungen to see that error
occur sometimes. Error only shows up on the menu
"Produkte|Leistungen".

But, the error was also visible right after the
fresh installation of the template.

Did you install this tempalte for Joomla 3 ? if yes, it was not compatible with joomla 3.0

no .. it's 2.5.11

And the error occured also after the fresh installation.

demo.omegatheme.com/joomla25/mega_orthodontis/

If you expand the menu "Our services" with a few more menus
the error must occur as well.

I did not see any error on FF, what's your ff version ?

Regards

final version:
22.0

Can you remove all browser cache ? and then try again ?

Regards

cache removed but the error still occurs

Hello,

We checked on differences PC / Windown 7 and it's working fine. What' your OS version ?

Regards

It's Windows 7. Meanwhile the homepage is active.
And the customer already complained about that error.
I was able to reprocuce it again just a few minutes ago.

just click on one menu and then move the mouse over
the long dropdown. Repeat that until the error occurs.

Dropdown works fine when javascript loaded 100%.

Regards