Hi guy,
I solved the dropdown menu bug.
Here is the bugfix:
the buggy css file:
filepath:
plugins/cck_field/wysiwyg_editor/assets/css/cck_wysiwyg.css
Delete in line 3 this attribute: width: 100%;
Please let me know, that the bugfix solve the problem. It takes me a half day to get it work. ;)
Best regards,Sebi