Glad to see that all the crossposted newsgroups are in the header of the message panel now.
Maybe just a small adjustment. Now it looks like this:
ref: uni-berlin.de alt.comp.os.windows-10|misc.phone.mobile.iphone|alt.os.linux
I think with a bit more space space between the groups it would be easier to read (and I would prefer the slash over the pipe which looks too much like an I or an l)
ref: uni-berlin.de alt.comp.os.windows-10 / misc.phone.mobile.iphone / alt.os.linux