Hi Adeodato, I am such a stupid idiot. I don't use DB4 support because I hate DB4 and gdbm is much more reliable in my case. However I now see why I didn't caught the problem. Now the problems are really fixed and http://wwwcip.informatik.uni-erlangen.de/~sithglan/mutt/mutt-cvs-header-cache.3 is available. Thanks for guiding me through this. :-) Thomas