[BUG] Blog feeds don't work for member id greater than 9999

[K-mans]

I don't know why this is happening, but it is a bug I have verified on my site and will check some other sites if I can find ones with more than 10,000 members. When I try to view the RSS feed of a member with a userid less than 10,000 the RSS feed works just fine and shows the blog, when I try to view a RSS feed from a member with a userid 10,000 or greater it fails to display anything in the RSS feed from the blog.

Here are examples:

http://www.planet-9.com/blog_externa...loguserid=5646

That one works, userid is less than 10,000, this next one doesn't work:

http://www.planet-9.com/blog_externa...oguserid=11723

Is this a known bug? If so I couldn't find it or a fix. Please help!