This is a UI regression from ST2:
When you are in project mode with a tree opened in the explorer and you have the "open files" container visible, you cannot open 2 files in a row :
Opening the first one by doublez clicking works, but then double clicking on a second one will re-select the first one.
This is an UI defect because what happens when performing the double click is:
first click, selects the new file in preview mode AND it puts it in the open files list, which then shifts the explorer from one line down.
second click now selects the file directly above since the list has been shifted down
This is a major problem for me.