I tried it with the latest stable version 139 and with the newest beta release 144.2 and with both versions I got a black screen, when I try to upload a html5 archive to newgrounds.com and to gamejolt.com.
It happens with my games "Poo Birds" and "Space Construct: Infinity", but strangely not with "Castle Construct" and "Card War".
Link to .capx file (required!):
PN me for capx-file
No black screen, game should run correctly
Internet Explorer: ?
Operating system & service pack:
Windows 8 newest version
Construct 2 version:
Latest stable (139) and latest beta release (144.2)