New feeds don't refresh

Feeds appear to load using add feed button but don't add using RSS icon.  New feeds have no articles and subsequently check but refuse to refresh.  Only exception is the version history feed  - this loads and updates OK.  I think Newsfox functioned fine until Firefox was closed with all tabs.

Newsfox updated to 1.0.4.1 with Firefox 3.0.3  Private data cleared.

Thanks
shelterhelper