Hi, first of all, I'm using 17.04.0, so if this isn't supported, then never mind!

Well, the title basically says it all. I'm trying to set up a sequence of images with narration, and when I try to set the duration of each image clip, each minute only has 30 seconds. That is, if I increment using the arrow, I see 6,28 -> 6,29 -> 7,00 which is ... odd. If I try to type in a time manually (eg, 6,41), the duration just doesn't get saved when I select OK. What the heck is going on here?!

I think you are referring to the last number in the time field. The last number is the number of the frame in the second. I bet you have a 30 frames per second project and that is why the last number goes from 0 to 29 (which gives 30 units).

Aha. That never even occurred to me, but it's really obvious in retrospect I'm glad I'm not having a stroke, and this will make my videos suddenly much easier! Thanks