On one of the blogs I manage, clicking on any of the category archive pages results in the following error message:
`Warning: Invalid argument supplied for foreach() in /htdocs/savageminds.org/www/wp-includes/
template-functions-category.php on line 129'
The strange thing is, the page otherwise loads correctly. I spent the last two hours looking around for some kind of information that might help solve the problem, but I couldn't find anything. I went through some categories where I noticed some posts didn't have the "parent category" listed, but changing that didn't help anything for the categories in which those items were listed.
You can see the blog here:
And a sample category page here: