RSS feed

Hi all,

Does anyone have an issue with RSS feed?  I have 5 wikis I
manage and  
I upgraded 3 of the wikis to the latest dokuwiki version. 
RSS feed  
doesn't work with those 3 wikis but the others that didn't
get  
upgraded work!

Another observation is that those 3 wikis (upgraded ones)
RSS feeds  
display the changes in the browsers (ie safari RSS) but not
in  
Thurderbird.

Any thoughts?
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