This is a bit difficult to explain, so I'll present it as 'What I do'/'What should happen'/'What happens'.
What I do:
I open a directory and I want to find a file/folder by typing the first letters of its name - its a feature I use a lot. Then I hit Alt+Backspace.
What should happen:
The last character in the quick find box should be deleted.
I go up one directory. It's as if the letter box doesn't hold the keyboard focus.
Does that happen for other people, and is there a way to fix it?