Version: 4.7 (using KDE 4.7.3) OS: Linux If I edit the filter criteria for an existing filter, it loses name and renames itself to the first filter criteria. For instance, if I had a filter named Google+ which filtered on e-mails whose from contains @plus.google.com, and I edit the filter critera, it's renamed to <From>: @plus.google.com. Reproducible: Always Steps to Reproduce: Edit the filter criteria of an existing filter in kmail. Actual Results: The filter is renamed to the first filter criteria for that filter. Expected Results: The filter name is unchanged.
It's normal otherwise you must rename it and after that it will not change name.
If I wanted to rename it, I'd click on the "rename" button and rename it. Having the name change because the filter criteria changed is _highly_ annoying. If this is as designed, it's a major mis-feature IMHO.