You know what? I've been having the same problem. I didn't notice it until a couple weeks had passed after Drew's last update but it starts with a random reboot. Most of the time I'm not actually doing anything with it at the time and it just reboots. After the reboot, my data2ext4 partition ends up unmounted. Fortunately, all I have to do to restore it is re-flash the data2ext4 zip file. After that however, I start to experience the same issues that mgardner323 is pointing out. The random app FC's, followed by more & more frequent Google Frameworks FC's, random reboots on the order of 2-3 times per day and finally a point where I can't start ANY app without it FC'ing almost immediately. I only allowed it to get that far since my computer wasn't working for about a week and all of my flashable zip files were on it rather than my microSD card (never doing THAT again...). After that I completely wiped my phone, flashed the system debug, the 7.1.0.1.6 rom, and the 08/31 XioniaRedux kernel, and then the 06/13 Google Apps.
Right now it's working just fine but I'm thinking about popping over to thekraven's CM7 port until Drew releases a new build. It's been more than a week since the last time I flashed after all