https://sourceforge.net/apps/trac/sourceforge/ticket/12572
My user name, for example, shows up as ACCOUNT CLéMENT PIT--CLAUDEL LOG OUT in the top right corner. The problem sometimes also happens in the regular SF site.
It should display as "Clément Pit--Claudel", as you can see here: https://sourceforge.net/users/createsoftware
You can see the error here: https://sourceforge.net/u/createsoftware/profile/
Another: https://sourceforge.net/apps/trac/sourceforge/ticket/13184
Apparently at some point in the last 2 months, we fixed this.