Hi Nickolai, I have no clue, really, but it sounds like this could help:
(info "(gnus) Changing Servers") In particular ‘gnus-group-clear-data’ is maybe what you should do. You can make a backup of your data (.newsrc) and, yeah, maybe that's already the best you can do. I don't know how Gnus assigns article numbers, but maybe those numbers are invalid in your case anyway (sounds a bit like it). HTH, Michael.
