RSS Feed Not Updating

For the life of me i cant seem to get the portableapps rss feed to update automatically using the firefox default reader. I have tried deleting all portableapps references in my bookmarks before re-adding it and even compacting the bookmark database afterwards. I am using firefox 3.6.13. Manual updates and other readers work fine

Also, i am using the httpfox addon to try and diagnose the problem. No connection is even made whilst all my other feeds update. Plus i get the following error when i visit portableapps.com...

GET (Aborted) text/xml (NS_BINDING_ABORTED) https://portableapps.com/feeds/general

Could that be the problem ? Im stuck as to what could be causing it