Just like the subject says. Is powersearch not working? I'd use powersearch to answer this, but . . . no matter what I type, I get no results.

No problem here...

Did you set some strange search preferences and did you save these settings?

Power serch definitely behaves as it feels at the moment.
My (very brief) test:

1) Type "robthebold", press Search. Result: "No results. Did you mean rob the bold?"
2) Type "pichlo", press Search. No results.
3) Type "robthebold", press Search. As #1.
4) Do not type anything, "robthebold" still in the entry box. Press Search again. 6 results.
5) Repeat #4, results as #1.

I didn't even know that there were search preferences that affect powersearch. But just for grins and giggles, I tried it without being logged in and got the same result, that is no results.

Additionally, the powersearch text box only seems to appear in Chrome. I just see the "Loading" message in Firefox and rekonq. So something funny is going on, perhaps involving our friends at Google.

If I'm patient enough, and I click the "Search" button enough, sometimes I get a list of results somewhere on the 2nd to 13th try. Other attempts will sometimes give me nothing -- not "no results", just nothing at all, as if I hadn't pushed the button. Sometimes I get the "No Resutls" bar. Sometimes I get just an orange line.

So, much as we like to tell posters to "use search" and "search is your friend" here, search is not being my friend. In fact, on the 3rd click of the "Search" button, I saw the "No Results" message as the result of search for that phrase: "search is your friend". On the tenth click I got 1890 results. On the other clicks I got the nothing as described above.

I get this on my Kubuntu machine connected to my home network. I see it on my N9 whether connected to the home network or connected over 3g.

If other users are seeing the same thing, they might be forgiven for not "solving their own problem" when they had in fact made a good faith effort only to find that what they sought was not to be found.

Would it be appropriate to add "Please try clicking 'Search' several times if it doesn't give you any results" to the powersearch page? Am I the only one that sees this except for Pichlo who experienced it twice? If it's just me, then the solution is for me to just do as above. But if it's more widespread, someone who knows something more than me about the scripting that powers the powersearch query ought to look into it.

Just like a lovely old car...
it seems it needs to be given give a kick or two every now and again to get 'er goin'...

Elementary, Watson!

I disagree with you, I always use Power Search.

As for the OP:
Some browsers somehow doesn't like the "Enter" button, if you click on search instead of pressing Enter, it should give you results

As I do (and I propose to use only that one).

Like the sfos browser on my Jolla

This! Also, are you using any adblockers by any chance? For me, the Ghostery and Disconnect plugins seem to disable (parts of) the Powersearch function.