Feedback 1.1 still generates errors when going to non-http pages

[Morac]

The following errors show up in the error console if going to a page
in the browser that isn't a web page:

Error: Component returned failure code: 0x804b000a
(NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]
Source file: resource://testpilot/modules/feedback.js
Line: 107
----------
Error: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE)
[nsIURI.host]
Source file: resource://testpilot/modules/feedback.js
Line: 109


For example, any of the about:xxx pages such as about:addons or
about:cache.