Barely a few months (6, 7 ?) since using Mac OS X and my system has got basically unusable: MacPorts has died and gone to hell, root certificates get systematically rejected by Safari, the system is sssoooo ssssllllloooowwww that using it feels like moving in water. Firefox crashes every few hours. Parallels isn’t working anymore in Coherence mode.
The system is so unreliable that my only option is to reformat the machine and restart from scratch (basically what I had to do when I used XP — but XP usually lasted a good year and a half between reformats).
With that and all the software incompatibility problems, I am seriously considering switching to Windows 7 + Cygwin and thrashing this whole Mac OS experiment in the huge pile of “tried: didn’t work”.