UPDATE: Dec 4, 2012, Another week has passed since I upgraded from Mate 1.2 to 1.4 using the official backports and everything is fine, no crashes, system freezes or kernel panics, everything is workin' like it should!
Linux Mint Debian Edition MATE DE 64-bit
Gigabyte G41M-ES2L--->2gb ram
Intel Pentium Dual Core 2.60ghz-->E5300
Proud user of LMDE