Hi, I'm not sure what your problem might be. Must be something with the language pack or a mod or plugin you have installed maybe. No title is used for that icon just a default tooltip when you hover over it. How does the default style look?
See picture below.

http://img847.imageshack.us/img847/9355/66493450.png

Thanks for your answer,
It seems that the hover text is permanently shown.
I looked for the code in the php-file, but it´s only the alternate text....

mhm... i am a little frustrated...

same in default style

If it is the same in the default style you will need to submit a support ticket over at vbulletin.com for help. I really do not have time to investigate at this time. Sorry

After the last failed install attempt I've once more tried to install this and still it's simply not working. Blackend is selected in the Style Manager control panel but all I'm getting is the default vBulletin style.

Can anybody please help me to work out what is going wrong?

http://www.cultmovieforums.com/forum/

I am unable to select any other style on your forum. There is no style selector at the bottom. If you would like PM admin details to me and I can see if there is anything installed wrong or a setting.

Many thanks, I have PMd you my details. Incidentally, when I attempt to change the default theme when I select this one the forum doesn't load, so something has gone wrong again somewhere.

Very strange.. there are 1000's of people using this style i think the problem is certainly to do with your forum.. is it a new install / site ?

Yes, I upgraded to v4 last week.

Alright I tried to reinstall the style with no luck. I'm kind of at a lose as to why it loads a blank screen when switching to the Blackend style.

Before going any further if you could make a DB backup and we can try another style or have you tried another 4.1.2 style from someone else?

I was getting all kinds of errors on themes not working/displaying correctly after I upgraded to 4.1.2 yesterday as well. When I imported the new theme I would get a message saying

"Failed to write css files. Please make sure that the directory 'clientscript/vbulletin_css' is writable...Done" after I clicked import.

If you notice you are getting this same error, log into your ftp, and CHMOD the directory Forums/Clientscript/Vbulletin_Css to 777.