FireFox 16 and Adobe Flash Issue

[awarecons]

.xsesssion-errors:
*** NSPlugin Viewer  ***
WARNING:(/nspluginwrapper-1.4.4/src/npw-viewer.c:1196):invoke_NPN_InvalidateRect:
assertion failed: (rpc_method_invoke_possible(g_rpc_connection))
*** NSPlugin Viewer  ***
WARNING:(/nspluginwrapper-1.4.4/src/npw-viewer.c:1196):invoke_NPN_InvalidateRect:
assertion failed: (rpc_method_invoke_possible(g_rpc_connection))
*** NSPlugin Viewer  *** ERROR: rpc_end_sync called when not in sync!

Terminal output:
NOTE: child process received `Goodbye', closing down
NOTE: child process received `Goodbye', closing down
NOTE: child process received `Goodbye', closing down
NOTE: child process received `Goodbye', closing down


Some flash animations, videos work some not, for e.g.:
The working video:
http://www.youtube.com/watch?v=ZTPdKUA9Ipg&feature=g-logo-xit

The problem video:
http://www.youtube.com/watch?v=brGkPKjwclE&feature=plcp

HTML5 seems to work.

Shows no version box at http://helpx.adobe.com/flash-player.html

In other browsers like Chromium, SeaMonkey, Opera... everything's fine.

Supposedly, there's some incompatibleness with FireFox 10+
and nspluginwrapper-1.4.4, because FF 10 and earlier work fine, but FF
12..16 fail...

Thank you in advance.