issue when committing to sourceforge

[Peter FELECAN]

I'm having issues committing to SourceForge:

Authentication realm: <https://gar.svn.sourceforge.net:443> SourceForge Subversion area
svn: E170001: Commit failed (details follow):
svn: E170001: MKACTIVITY of '/svnroot/gar/!svn/act/ede9338f-9d0e-e71b-83fc-b722b37016c2': authorization failed: Could not authenticate to server: rejected Basic challenge (https://gar.svn.sourceforge.net)

Nothing changed since the last successful commit. I'm the only one to
have this kind of behavior?
-- 
Peter