Why is this?
 

For some reason, some member names are bolder then other names.

For example:

http://img156.imageshack.us/img156/1...teredmembs.png

The names underlined in yellow seem to be the lighter ones, and the ones underlined in green are "bolder".

If someone can tell me possible ways as to why this is, I would appreciate it because it just doesn't look nice in my opinion.

Note:

All those underlined people are under the Registered Users membergroup, and their HTML markup is blanked out.

Could be a mod/product?

Any feedback appreciated.

Are those members in any additional usergroup which has HTML markup like that ? their primary usergroup may be Registered users but the display group may be different.

Fixed.

Was a problem with a different group.