Hello, I found a problem with the icons of the xfrun4 dialog in 4.10. It's hard to reproduce because it happens mostly random. But I made two screenshots of the same problem with different icon themes to remove the possibility that it's caused by problems in the icon theme.
Created attachment 4511 problem with elementary icon theme
Created attachment 4512 problem with faenza icon theme
I also confirmed that it happens with two different gtk themes. It happened with greybird and elementary, as you can see in the screenshots as well.
It uses normal button loading, so it looks like a problem on your system if the icons are too big. The error is not very consistent either, because in the first show the find icon is bigger, in the 2nd the close.
Not much i can do.