I did try to find something useful, but had no success I think:
"Right click anywhere on the page and click "Inspect Element". This will bring up the web inspector.
I did as you asked: no error, no message, no anything.
"One more thing, do you have any script related plugins running? Like "System - Mootools Upgrade", "System Mootools 12"?
NinjaJournal are using Mootools 1.2 in the admin, and we make sure that the joomla js continues working.
However, since we started doing that before any of these other mootools related plugins got here, chances are we might be in conflict."
"All in all what I'm saying is what do you have installed on your site, that differ from a vanilla install?"
Well it is almost a vanilla install:
components: jce, joomla update manager (Sam Moffats one, the dutch version) and Ninja journal
template: Joomlabamboo template Rasa v. 1.0 (with Zen Grid Framework, v. 18.104.22.168)
Plugins: joomla bamboo plugin jb-library (I de-activated this one but that did not change a thing); I did have the plugin (and the module) cache cleaner by NoNumber, I de-installed that one and got no change at all.
"We collaborate tightly with most template clubs, so chances are I'm able to install the same software as you in order to resolve things much faster."
I can give you via pm an inlog as superadmin to the site if you wish.
"Telling us your server and joomla specs could also help.
Things like your php version, joomla version etc."
The site runs on one of Rochen's servers.
Hope this helps,