Incontinent dropdown menus and missing task button images

Since the installation of phpBB3 - there are display bugs visible in all browsers.

[ Please refer to the attached screenshot ]

After login - the post/topic dropdown menu is always down, and when clicked away.. then the members menu drops down.

( at all times - one menu or the other is down ).    Some task button images are missing as well.

 
Also..   after login - all menu text is in English - even though Deutsch is set as default language (not good)

prior to login - the menu text ist auf Deutsch.

We need to resolve the issue before the board can go public

Cheers!

Aevik