Will be following here to see if you guys have any progress
There will be no progress 'here' (from krpano side) on that crash topic itself - WebGL is completely broken in beta 4 and that's nothing were a workaround would makes sense now - that's not a krpano related problem, all WebGL pages will crash - just trying to detect if the device is supporting WebGL is already enough to crash Safari.
Everything else beside WebGL is still working fine - I have already done internal tests with removed/disabled the WebGL detection for checking this.
Btw - please don't forget this is an iOS beta version!
That WebGL crashing itself is a fundamental beta 4 bug and was already reported as several times to Apple now and I'm sure this will be fixed in the next beta.
To get a working device again, just restore to iOS 7.1 or iOS 8 beta 3.
Best regards,
Klaus