I installed a feed that Feed Validator said was 'okay', well it had one problem with the way the title was coded but said it would work.
Anyway it installed okay via the RSS Widget but on the page I got this message:
Warning: Attempt to assign property of non-object in /www/business/5382/wp-includes/rss.php on line 440
Got no idea what this means.
The Feed in question is: