simple shell script to compare two dirs recursively

[Per olof Ljungmark]

Hi all,

I could *probably* cook this myself with some time and patience, but now 
it is somewhat urgent, so if someone likes to share their already 
working solution I would be most grateful.

I need a *simple* shell (does not matter which) script run by cron that 
recurses through two directories, compare all the files and produces 
simple diffs IF there are any. I'm sure this is something that a lot of 
you already did.

Thanks so much to all the nice folks on the list and FreeBSD in particular!

Per