I have downloaded the latest test build r12932, and find that it treats frames in an entirely different way to what it test builds did less than 3 months ago.
Positioning the mouse pointer over any one frame and rotating the scroll wheel used to scroll only the frame that it was underneath it; now it scrolls the whole caboodle, and reveals a previously unseen blank frame at the bottom. (??) It also scrolls (using the slider bars) much less smoothly, and rather more jerkily. I am looking at: Wild Flowers http://wildflowerfinder.org.uk/ -- Cheers Roger Burning the midnight candle at both ends of the barrel