file not behaving as it should, permission problems I cannot delete or move a file owned by me which I have read write permissions. Could anybody help me figure out why? The file is owned by me in group staff and perms are set to 644. The file is located in my home directory it is a single jpg file, any help would be much appreciated.
fire up Terminal and check the file

 ls -leO  (that's a capital O not a zero)


and if the uappnd flag is set, try

 chflags nouappnd a.single.jpg