Thanks for responding and sorry for not being concrete on the problem.
In 10.3.3.1 (and 10.3.3), the instant details window doesn't show anything when hovering over any tagged text (English with Strongs, Greek or Hebrew). If I click, then the popup shows, but otherwise nothing. Also, I noticed when checking, that the search box doesn't let me type anything instantly either. As in my original post above, it may be at best 10 secs before typing appears. The other features of the text window appear to work ok.
This doesn't happen in 10.3.2 which I know had other issues that are probably now (at least in part) resolved, but I'd rather have them than instant details and the search box not working.
I also have access to a Windows 7 machine, where this problem doesn't occur in 10.3.3.1, so perhaps this is just a Vista issue, or some issue on my machine?
Thanks again for asking.