Display of slug name instead of search term on results page

I observed that the search term displayed behind “Images tagged …” is the slug name of the page. It is NOT necesarrily identical to the search term when special characters are included. For example if the category is “Frühblüher” then this will be the label of the tag but the results page will show Images tagged “fruehblueher” as “fruehblueher” is the slug name.

This somewhat confusing as the user has not clicked on the slug name.

The problem would be easy to correct as the page title always includes the correct search term, in this case “Frühblüher – […]”.

It would be good if you could display the real search term instead of the slug in the header.

Thanks!
Steffen