I'm pretty sure that if you tried the "Glob & Smash" method on something like my AXP 2800+, it would short out the CPU because it would squish out onto the circuts surrounding the thermal contact point (which is only a tiny square in the center of the chip). I have never tried it mind you, but it seems logical that this would happen when the are circuts only a few mm's away from the thermal contact point.
Stryker