It must be new, because until a week ago I would appear on the reader, now I don't at all. If you want to stop poisoning the effectiveness of the Reader, then why don't you ask people to nominate one tag for the reader, I would gladly say that I only want my blog to appear in the photography reader. I don't want it anywhere else.
I do like being able to give my blog many tags, so other browsers can pick up my blog, and I have often got new followers from google. I don't know what people will be looking for and I feel very restricted being only able to nominate 10 overall.
As you stated, I did only put 10 and my blog still didn't appear on the reader. Also the reader, would load so many, then I would get a message saying, "wait, there is more", but no more ever appeared. This new reader is hopeless, I don't know how long you expect people to keep using it, I think I've had enough.
Also, something has happened with the follow button that is the top of every page. I have clicked it for nearly every blog I was following, and I was getting an email from each one, and then about a week ago, that magic time, it stopped, if I haven't pressed subscribe, I get nothing now.
What other changes can we expect?