If changing minfree settings help, then maybe the un-supercharge fixes the problem for now. Ofcourse you can always supercharge again with different settings, as supercharging "should" work, as many people benefit from it. Maybe the "min_free_kbytes" from supercharge is a bit too high ? Default is about 2700kb, supercharge will put it to almost 8MB. I think the kernel could get to panic if it's set too high?...just a guess.
Also without rom toolbox you can apply the optimal minfree settings from init.d directory with a small script if your kernel supports it.
Maybe you can share the "optimal" values in this thread
Br.
Michel