Video of issue: https://www.youtube.com/watch?v=Dzx7incs3Lw STR: * Create an outer scrollable div with an inner iframe navigated to a page that doesn't scroll (note scrollgrab is only enabled for certified apps) <div id="wrapper> <iframe src="http://chrislord.net/files/mozilla/clipping.html"> </div> wrapper.scrollgrab = true; #wrapper { overflow: scroll; } * Scroll inner frame Alternative STR: * Apply Gaia patch from bug 1039519 (or checkout Gaia feature branch at https://github.com/benfrancis/gaia/tree/1039519). * Build Gaia with HAIDA=1 (warning: the UI in this build is going to look pretty broken, but will allow you to reproduce this bug). * Tap the Rocketbar * Type http://chrislord.net/files/mozilla/clipping.html * Wait for page to load * Overscroll the iframe * Lift finger Expected: * Pretty overscroll Actual: * iframe freezes mid-scroll

This is possibly the same issue as bug 1040226 (in which case it's not specific to scrollgrab, but affects all instances of overscrolling after scroll handoff).

The patch on bug 1040226 fixes this.