Bug#776470: browser-plugin-lightspark: Github redirects to 404 on iceweasel

[Ruben]

Package: browser-plugin-lightspark
Version: 0.7.2-6
Severity: important

Dear Maintainer,

When opening a github.com project page with jessie's Iceweasel it briefly 
shows the page and than it redirects to a 404 error page. The front page 
works fine, it only happens on a project page. 
It works fine with Chromium.
It works fine in wheezy with gnash.

The url after the redirect is something like:

https://github.com/basho/javascript:%28function%28eventObj%29%20%7B%20%20var%20objectId%20=%20%27global-zeroclipboard-flash-bridge%27,%20%20%20%20%20%20ZC%20=%20null,%20%20%20%20%20%20swf%20=%20null;%20%20if%20%28typeof%20ZeroClipboard%20===%20%27function%27%20&&%20typeof%20ZeroClipboard.emit%20===%20%27function%27%29%20%7B%20%20%20%20ZC%20=%20ZeroClipboard;%20%20%7D%20%20else%20%7B%20%20%20%20swf%20=%20document%5BobjectId%5D%20||%20document.getElementById%28objectId%29;%20%20%20%20if%20%28swf%20&&%20typeof%20swf.ZeroClipboard%20===%20%27function%27%20&&%20typeof%20swf.ZeroClipboard.emit%20===%20%27function%27%29%20%7B%20%20%20%20%20%20ZC%20=%20swf.ZeroClipboard;%20%20%20%20%7D%20%20%7D%20%20if%20%28!ZC%29%20%7B%20%20%20%20throw%20new%20Error%28%27ERROR:%20ZeroClipboard%20SWF%20could%20not%20locate%20ZeroClipboard%20JS%20object!%5CnExpected%20element%20ID:%20%27%20+%20objectId%29;%20%20%7D%20%20return%20ZC.emit%28eventObj%29;%7D%29%28undefined%29;

If I disable Flash plugin (lightspark) in Iceweasel it solves the problem.
There is no other flash player installed.

So it seems there is something with lightspark that github doesn't like.


-- System Information:
Debian Release: 8.0
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.17.4 (SMP w/4 CPU cores)
Locale: LANG=pt_PT.UTF-8, LC_CTYPE=pt_PT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages browser-plugin-lightspark depends on:
ii  libc6               2.19-13
ii  libgcc1             1:4.9.1-19
ii  libglib2.0-0        2.42.1-1
ii  libglibmm-2.4-1c2a  2.42.0-1
ii  libsigc++-2.0-0c2a  2.4.0-1
ii  libstdc++6          4.9.1-19
ii  libx11-6            2:1.6.2-3
ii  lightspark-common   0.7.2-6

Versions of packages browser-plugin-lightspark recommends:
pn  gnash-common  <none>

browser-plugin-lightspark suggests no packages.

-- no debconf information