[NTLUG:Discuss] Help request

[Fred]

Strange... This morning I logged in to my account, read the mail
then tried to save a picture to my Pictures directory and got an
error that I didn't have access to that "folder". Here is what I found:

ALL of the non-hidden (not dot files) directories had their permissions 
set to 444. After changing them back to 755, everything worked ok.

The question is, obviously, WTF would cause that to happen? I haven't
heard of any Linux nasties floating around the net... and the cats
haven't learned how to type (I hope).

Fred