I noticed in my code, as well the Splay demo app, that gridlines, annotations, etc seem to move like stop-and-go-traffic/slinky when you pan. It's especially noticable if you do a very slow pan. I tried to include an animated gif here of the behavior in the SPlay app, but guess I need to host it somewhere in order to post it. (shinobi, I'd be happy to email it if you like)
If one has zoom turned off, as I do, I wouldn't have expected this behavior. Anybody have tips on how to get silky smooth pans with annotations? Since I have a limited data set (spanning just a few screen widths), I'm starting to wonder if I should try to snapshot the full width of the chart, and stuff that in a scrollview.