For folders in my button bar, I can do Ctrl + LMB to open folder in new tab. If I do Shift + LMB it opens in the current tab.
For the Directory Hotlist, I can use both Ctrl + LMB or Shift + LMB to open directory in a new tab.
In the Find Files dialogue I can press Shift + 'Feed to listbox' to feed the results to a new tab. Ctrl + 'Feed to listbox' opens in the current tab.
So to open something in a new tab your options go from Ctrl-only, to both Ctrl & Shift, to Shift-only.
Because I open new tabs from Button bar and Directory hotlist using Ctrl + LMB very often, having to use Shift in the Find File dialogue threw me off a little bit.
It'd make more sense if everything was all Shift, all Ctrl, or all Ctrl & Shift, instead of the mix it now is.
Edit: Changed all instances of RMB with LMB. Left and right, I swap those around sometimes, for no particular reason.
