Posting options don't work for some.

[MixMakers]

For some reason, some of the posting options don't work for some of the users - like bold, italics, underline, etc. Here's a screenshot of what I mean:

http://img271.imageshack.us/img271/3871/2139jb.png

Also, for some members the usernames in the showthread are unclickable. Any help would be appreciated.