Yeah, deleting other non-AF apps won't help (unless you have a jailbrake) because those apps can't even run at the same time as AF. You're just wasting your time when you do that. Best thing to do if you can't fix with a restart is to wait for the next update.
Thanks for the point-I don't have an unusually large collection of music or photos. I wasn't thinking of ram per se but the space taken by storing the data as it advances.. Interesting in that as I was playing recently I got a caution regarding lack of space by AF. What space could it be referring to then?