The problem was I wasn't trying to clip any text, I was just doing ctrl+F12 with opera focused which I expected would do the same thing as when clipping text but with a blank body -- ie, current page title as the title, a blank body, current url in link field. It only gets the title right now, leaving the url field blank. I don't mind selecting some random text on a page to clip if I'm using it in an unintended way though.
I see. Yes, this is a known limitation. Unfortunately clipping the URL without selecting some text is difficult to implement, since CintaNotes relies on the clipboard for clipping. But it is doable, and there is a request on the roadmap for it:
http://roadmap.cintanotes.com/topic/320 ... ion-empty/
I suggest you vote there for this feature. The number of votes determine whether the feature gets implemented and when.
Thanks again for posting!