JesterMagic - 7:02 pm on Apr 23, 2013 (gmt 0)
Don't know if they still test these as an initial dupe sniff test, but I'd stay away from them if at all possible. Best practice a few years ago was that it was better to do without a description rather than have dupes.
Really... I didn't think of not having a meta description.
How about a topic that lists items. My topics each have their own meta descriptions but if the topic spans multiple pages (which most do) each of those pages share the same meta description. Should the meta description for page 3 of the topic then be something like:
Some topic meta description here - Page 3