I don't actually know if it's been fixed in the latest build...
But, in short.. If you use ISO files a lot.. (and I do) .. there's a bug starting in the PREVIEW edition builds.
The bug is simple to understand... if you re-select the same ISO file from the dropdown, the pick list sees it (again) as a new file, which it isn't.
So, instead of seeing the nice "Last 10" ISOs you ever used.. (The way it used to work...) it now shows you the last 10 you used.. EVEN if they were the exact same path/file (which is a bug.)
Please verify / let me know if this will be fixed.
Thanks in advance.