Figured out what it was; the clutch switch. Today I popped over to Chadstone to grab a couple of things from the supermarket. Bike was completely fine getting there (not far enough to warm it up properly, but that shouldn't cause immediate problems), as it was when I went to Mulgrave this morning. Unfortunately, when I wandered out and tried to leave I hit a problem: Turn the key, usual lights come on, press button, light goes off (as usual), and... that's it. Doesn't turn over, or anything else perceptible. My guess is that one of the killswitches is going through a rebellious stage, or one of the cables is slacking off. I did have a poke at the cables, and a look at the inside of the switches, but there wasn't anything obviously wrong (the solder was there an' all that), and I didn't want pull things apart too much on a Sunday night. Its a 2008 GS500, had it's 18,000km service done a few hundred k ago (at Mad Biker), was repaired by Bikecraft about a thousand k ago (not my fault, I swear! ), has plenty of fuel, Melbourne was quite warm and dry today, annndddd...... I usually turn it off with the switch on the bars, and rarely use the sidestand. Can't try things out immediately, as it is sitting around in Chadstone (a camera has a good view of it), though I can get back to it relatively easily (live a few km away, with buses passing close by). Thanks in advance for any help offered, hopefully I haven't missed anything important or been too verbose .