The only think I can think of would be a long delayed vet rewards gump, or perhaps a BOD name gump if the cursor is over the game gump. Since I dropped the two second delay in it has been running without a problem for a day and a half, wich is significantly longer than I was able to run before. I am going to start adding in a bunch of additional shard toons to do a cross with Ultima and I will report back after my stress test.
As an aside, I am thinking that the script loses time by resetting the clock on the cycle at the last toon. I wonder if you tested it resetting the clock on the cycle by the first toon instead. I may make that change and see how it runs, unless you let me know that its a bad idea for some reason....