(I thought I reported this last winter, but this forum says I have no posts ...)
Running version 1.5.0.2, if I click the column header for "Publication Date" so that it will sort by date, what it actually does it sort by the str() representation of the date. This means that, for example, "10/1/2008" precedes "9/1/2008", "9/10/2008" precedes "9/2/2008", and "2/1/2008" precedes "2/1/2007". If I could change the date representation to ISO 8601 (yyyy-mm-dd), this would be okay, but I don't see a way to do that.