I joined this forum in mid 2012 and non-working Power Search was among the first things I noticed. I never paid too much attention to it since I had the two other options that worked. I simply considered non-working Power Search a fact of life and never used it.

This thread renewed my interest and just confirmed what I had known for the past three years. Power Search Does Not Work™.

All my experiments in post #3 were conducted by pressing the Search button. None of them by pressing Enter.

I conducted all my experiments in post #3 using Firefox on Windows. The above comment by HtheB about different browser has made me thinking and repeated the same experiments using also IE, Saifish Browser and MicroB.

Ironically, the SFOS browser was the only one that has produced any results at all.

No.

Could Power Search be yet another one of those things that only work for some privileged users? I've had a few discussions with members who also happened to be moderators who could not undersdtand how could I be so blind (or stupid ) and not see the obvious, until I showed them that the thing I see when I log in are not the same as the thing they see when they log in.