I have a problem running SeaMonkey in any mode except browser. If I open the email program (either by icon or F2 or the desktop icon) it flashes for an instant (1/3second) and then everything is closed on SeaMonkey.
I am running Puppy4 on an HP 64bit desktop with 1Gig of ram. I have no trouble running Puppy 1 through 3 on this computer.