I'm seeing weirdness on OS X with Java 7u15 when I resize the app.
I'm using the green jelly to maximize the app. Sometimes it works as expected, other times it's mangled.
It tends to be goofed up in different ways... most of the time I lose the top of the menu bar, so I can't do anything useful. Sometimes when I minimize it things are out of whack too.
I can provide screenshots if necessary.
I'm running on a Retina MBP with a Thunderbolt display, though I doubt that makes a difference.
Spine version 1.0.16.
Thanks!