Beware while creating Maintenance plans using SP2.

I created maintenance plans from my laptop which has got SP2 to the servers that doesnt have SP2 installed. I observed that the old backup files didnt get deleted, I was wondering if that is a bug too so I started to create the maintenance plans from the server itself. so guys beware of this fact. I dont even know if that is a bug or not. Need to verify the same in other servers.

The another glitch is when you create a maintenance plan using a machine with SP2 we cant edit it from a non sp2 client or server, this is the way SP2 has been designed to work so guys beware of this fact too.

Any thoughts or insights in this? Did some one else found out similar issues?