I don't know about you guys, but when I updated (an actual update over a pre-existing copy) all power blocks ceased to work.
I figure this was a "simple" block-config error that I was unable/unwilling to hunt down and correct for myself.
before you ask, no, I did not try a clean install. I had neither the time to do so yesterday, nor have I had the inclination to copy over all the imoprtant things yet again. (having just done a "clean" update the day before)
EDIT: hit the "post" button a bit early, sorry.
Behavior of possible bug: all three of the power system blocks (reactor, capacitor, auxilliary) ceased to function after a newly loaded ship's initial "charge up", placing of new blocks would not correct the error, nor would a system reboot. (repeat behavior to the initial charge)
pre-existing ships exhibited the same behavior.