I have had a problem for a while and it ain't fixing itself. Any ideas as to what might cause it would be most welcome:
A little time after posting each new post (the time seems fairly random) my HTaccess file goes mental. I get multiple copies of the WordPress content over and over again. Sometimes I get just a few partial characters in random places, but it pretty much always renders my blog with a 500 server error.
It is simple to fix (wipe htaccess and save my permalink preferences) but the problem eventually recurs.