[Greasemonkey] Having Viamatic's AJAX Yahoo Mail extension installed breaks GreaseMonkey

[Michael Kraft]

With Viamatic's AJAZ Yahoo! Mail 0.3 extension installed
(http://viamatic.com/firefox/), any attempt to install a userscript into
GreaseMonkey 0.6.3 results in the following alert popup error:

Error installing user script:

[Exception..."Component returned failure code: 0x804b000a
[nsIIOService.newChannel]" nresult: "0x804b00a (<unknown>) location: "JS frame
:: chrome://ajaxyahoomailviamaticwebmail/content/browser.xul :: getContent ::
line 20" data: no]


If I disable Viamatic's extension than I can install userscripts.

I haven't looked into this so I don't know why it is happening, but I don't see
why they should interfere with each other.