When I click the "+ ADD" button, it brings up a "Select files to upload" dialog box. In this dialog, selecting lots of files either by holding down shift and clicking or by selecting with the mouse is very very slow (can take a 30+ seconds to select a few dozen files). Also, ctrl-A does not seem to work. In Windows, on a much slower computer than I use for Linux, I do not see these issues and ctrl-A works to select all files in a directory. Is this a known limitation? Other than this performance issue, Flickr Uploadr does work exactly as in Windows without bugs or problems.