From the command line (Bash), ST2 will not properly open a file whose name contains spaces. Instead, it opens one file per space-delimited word. For example, the following
sublime_text "some file name.txt"
will result in ST2 opening separate tabs for "some", "file", and "name.txt". This also happens when escaping the spaces instead of using quites:
sublime_text some\ file\ name.txt
This occurs in the current stable build,2139, and in all prior builds that I have used.