Where does the quick index go?

Sometimes rubygems likes to do a bulk update even when there's no  
possible way 50 gems could have been updated.  I added some code and  
found that occasionally the quick index just isn't there:

$ sudo gem install image_science
Fetching quick Gem source index for: http://gems.rubyforge.org
Quick index not found: 404 Not Found
Bulk updating Gem source index for: http://gems.rubyforge.org
[...]

-- 
Eric Hodel - drbrain-48TerJ1FxhPk1uMJSBkQmQ@xxxxxxxxxxxxxxxx - 
http://blog.segment7.net

I LIT YOUR GEM ON FIRE!