[eluser]attos[/eluser]
The DB might no be saving the date properly.
I didn't notice that the error you're getting is after the <pubDate> tag. The error might be in the function that converts the date from the database, either in your model, controller or view.
I use different databases and because each stores dates and time in different formats I try to save them as strings. I use the date() function before saving to the database. Then in the view I just echo the date:
Code:
<pubDate><?php echo $entry->created; ?></pubDate>