Please take a look at:
CSCsk49799
Symptom:
When using other language version of web browser such as IE or Firefox, some menus of CCM6 are displayed strange.
Conditions:
CCM6 has this issue. CCM4 and 5 has no issue.
Workaround:
change the locale of IE to US :
Tools > Internet Options > click "Languages" > Add "English[en-us]" > put it on top of the list