Cannot install - invalid value for 'content_scripts[0].matches[4]'

What steps will reproduce the problem?
1. Navigate to the extension details page;
https://chrome.google.com/extensions/detail/aeffggjddcchloadflonilaahpclmbn
m
2. Click Install

What is the expected output? What do you see instead?
Extension should install, but instead a popup spawns that says "Invalid 
value for 'content_scripts[0].matches[4]'."

What version of the product are you using? On what operating system?
Kubuntu lucid, Chromium 5.0.396.0~svn20100504r46318-0ubuntu1~ucd1 from 
chromium-daily.

Please provide any additional information below.
I had version 0.49.2 installed and noticed it wouldn't upgrade to 0.49.4. I 
tried reinstalling via the page linked above and received that error. 
Uninstalling the extension and installing fresh yielded the same results.

It is also thrown to the terminal, as such;
[30879:30879:332549404197:ERROR:chrome/browser/extensions/extension_error_r
eporter.cc(56)] Extension error: Invalid value for 
'content_scripts[0].matches[4]'.

Other extensions seem to install fine. I tried it just now with "Send using 
Gmail)".
https://chrome.google.com/extensions/detail/ahldefgplekckalfcolhhnljbbgaibo
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Original issue reported on code.google.com by zor...@gmail.com on 5 May 2010 at 3:15

Merged into: #19

noctarius / chromebackspaceonlinux

Cannot install - invalid value for 'content_scripts[0].matches[4]' #21