Was reading a thread on the pros/cons of multi-link sigs and thought of the directory problem some of you were having, so a question..... Were many of the apparently penalised ones using third party sig links?
If G discerns a pattern it may do more than just ignore them. I did a quick trawl through one thread, all the directories that featured in more than one sig (including two in yours) appear affected, it may just be coincidence, it may not....
Interesting thread here, but I have to go with mikey, I do not believe signature links are a issue. But, who knows, but honestly I do not believe it.
It seems no-one has bothered to do any homework on this and seeing how many rely on DP to promote their directories that's is a bit of a shocker to be honest....