Gnus mangles one of my group names

[Klaus Zeitler]

All of a sudden (since about 2 weeks) one of my nnml groups (called bridge)
gets mangled every time a new mail arrives.

When I receive a mail, that Gnus is supposed to distribute to this group,
Gnus instead creates a new group with the odd name "bridge?bridge".
I think there's some ascii character, maybe C-j, between the duplicated group
names.
The active file then additionally contains a new entry:
--- snip ---
bridge\
bridge 1 1 y
--- snip ---

an ls in ~/Mail shows something similar as new group name:
bridge?bridge

The old group remains unaffected. Everything's still there and the entry in
active file is also ok.

I noticed this the first time right after Gnus in CVS emacs got updated. I
haven't changed anything in my gnus configuration for months.

Does anybody have an idea?

Thanks

Klaus

-- 
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|  Klaus Zeitler      Lucent Technologies  |
|  Email:             address@hidden  |
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Never hit a man with glasses.  Hit him with a baseball bat.