It seems like JRoller screwed up again. At least, that’s what it looks like to me…
Cameron’s blog looks like this today:
And I also found another blog, which doesn’t even show the entry text.
Way to go! Fortunately Hani abandoned JRoller a while ago, so we can still enjoy his stuff 
Actually, Cameron’s blog is using template code that has been deprecated and removed from roller for at least 2 years. We finally removed it
There are replacements. For your second example, he’s using some custom code that doesn’t work anymore. This is a major upgrade, the first in 2 years 