Ok, I'll go first... 1.4.91 still has some little issues, but btsync's CPU usage on my Linux system, which used to be a steady 7-10%, is now practically zero while it's idle. Thanks! I'm running 1.4.91 on one Win7/64 machine, 1.4.91-i386-glibc2.3 on a Debian Etch box, 1.4.83 on two more Win7/64 machines (soon to be upgraded to 1.4.91), and 1.3.109 on a WinXP machine. All the machines seem to be playing nicely with each other, and I haven't seen any new problems.