By accident, I had a certain filename that looked odd in the Finder. You can reproduce it by naming something like this:
AAAAAAAAAAAAAAAAAAAAAAAAAAAAA .txt
That is 30x capital A, a space and a .txt extension. Rather than keep the ellipsis in the middle when resizing column view, it garbles the text. Also when you place the cursor over the name, the space shows as a tab. Using underscores works fine but it's a little odd as most filenames are fine.
I'm using 10.3.7.