Rss feed validates, but not does not update (in Opera)

[snokle]

I'm new to this forum, and tried to browse for similar subjects, so sorry if this has allready been asked.

I have an rss feed on my forum
(http://forum.example.com/rss.php), which validates and looks ok in RssReader (I get double posts, but that is not the main problem now).

But in Opera, the feed does not get updated, even if I set the update to every 5 minutes, and new posts do get added in that time. If I close opera and open it again, it reads all the new posts.

Does anyone know what this could be caused by? Can anyone see anything wrong with the feed?

Thanks,

-Sverre

[edited by: werty at 1:28 pm (utc) on Oct. 11, 2005]
[edit reason] Removed URL - Please see TOS #13 [/edit]