Trying version 3.2.1 for a new Asicminer USB with Windows 7 x64, cgminer crashes with segmentation fault when I enable debug output. With debug output turned off it runs for about a minute, but keeps failing with AMU0: Comms error (rerr=-9 amt=0)
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Version 3.1.1 still remains the most stable release for your hardware, but bear in mind you will need to use zadig to re-associate the device with the ftdi driver instead of WinUSB when you go back to it. 3.2.0 did not work at all for AMU devices so if you're trying the new code, use 3.2.1. 3.2.1a is just a binary built for older versions of ubuntu and no different to 3.2.1.
Compiling it yourself will not make it more stable as my builds should be optimal - the only advantage to building yourself is you can build a stripped down version containing support only for the hardware you want to use, and assuming you're on windows, compiling it is FAR from trivial.
Version 3.1.1 worked fine, but I went ahead and compiled it anyway out of interest. The segfault is from libpdcurses when writing applog(LOG_NOTICE, "Probing for an alive pool");
It might be specific to windows. I left a stacktrace on
http://pastebin.com/5eMb5dsfAbout having seperate threads - I agree it doesn't make sense to start new ones if it means you have to monitor them all. A bug tracker may be easier to work with than forum threads though.