2 1/2 Random reboots???

[wmh3]

First off, I love my phone. I rooted and unlocked the bootloader day one this summer. I have been running stock ics and now jb. Everything great! All of the sudden my phone has rebooted fully twice while screen is off. I know this because I wear a bluetooth earpiece and it notifies me connection lost. The 1/2 boot was weird, I was having a phone conversation when the splash screen came up for a couple of seconds I lost bluetooth connection, but the other person could still hear me? The only thing I have done to phone the past two weeks is install DS Battery Saver which disables data while screen is black. I don't know if there is any connection. Is anybody else having rebooting issues? Or DS Battery Saver issues?