With any game the size of Baldur's Gate, there are bound to be some things that don't always work the way they're supposed to. That is why we created a section on our official forums where you can report any gameplay bugs you may have found.
If you encounter a bug, post in the appropriate game's forum:
Our amazing staff of volunteers will help you identify the cause of the problem and make sure it gets entered into our bug-tracking system to be fixed. Or, if it a well-known bug, they will help you implement any known workarounds for the bug.
(If you're having trouble getting the game to run in the first place, take a look at the Troubleshooting items here on our support site; if none of those address your issue, please submit a request, and our support staff will be happy to help troubleshoot the issue with you.)