As I mentioned in another thread, I've made a custom iTunes-style slider control. In order to make it practical to use, I've decided to package it in an IBPalette. This seems to work fine except for one thing: resizing is completely insane. The control is 100 px wide by default. If I try to drag the right end over a couple of pixels, it will rapidly jump between 100 and 346 px (or thereabouts). And if I try to manually change the size in the "Size" info panel (to any size at all), it will be resized to 10004 x 9.
Has anybody seen this sort of weird behavior before? It's got me stumped.