So nobody has been assigned yet. The lockpicking sound bug should be easy to reproduce, just use the tutorial mission! I think it should be fixed because it can confuse newbies on whether an attempt has failed or they need the other lockpick. And as I wrote, I think the GUI issue isn't unimportant either, because it makes TDM look unprofessional at first sight although it's among the most professionally mod-turned-games ever! Compared to those I have the feeling most people here only care about the graphics and performance which should not leave gameplay or GUI affecting issues behind...
BTW, I can't find a link from here or the main TDM page to the bugtracker anymore! Is it hidden somewhere?