Google Docs Right-Click Menu Stops Showing

What steps will reproduce the problem?
1. Open a google spreadsheet with 2+ worksheets, demonstrate right-clicking 
works.
2. Enable plugin.
3. Refresh google spreadsheet.
4. Right-click might work on the spreadseet's first "workbook."
5. Go to the other worksheet, and try some right-clicking.
6. Eventually you will see that the right-click menu no longer appears.
7. Disabling the plugin and refreshing the spreadsheet resolves the issue.

What is the expected output? What do you see instead?
The right-click action should result in a context menu in Google Docs 
spreadsheets.  However, with the plugin enabled, and moving between worksheets, 
the right-click menu no longer appears to work.

Please provide any additional information below.

Original issue reported on code.google.com by douglas....@gmail.com on 24 Apr 2013 at 2:54

smittex / exif-vewer-extension

Google Docs Right-Click Menu Stops Showing #112