I've been having issues with the improved file dialogs as described by the blog.

I'm supposed to be able to remove entries in the list by right clicking an entry. On some items, it takes multiple right-clicks to remove an item. Some items just do not get deleted at all.

Starring items is hit or miss with many entries. Sometimes it keeps my selection, sometimes it doesn't.

I'm using the latest beta release, though this has been a problem for me since 3.6.