If you don´t see any version you are playing with the release version. and yes you definitely should install patches. There are two which you can take from the Larian Homepage.
The release Version unfortunately is full of bugs <img src="/ubbthreads/images/graemlins/puppyeyes.gif" alt="" />
Most probably your problem is a bug, but I don´t know exactely. - anyway the release version has so many bugs that patches are important.
another bad thing for you is that after you installed the patches youre savegames can´t be used any more. Sorry to provide only bad news here, but it´s the truth. <img src="/ubbthreads/images/graemlins/ohh.gif" alt="" />
Bernhard
