So I'm screwing around with Lazarus/Free Pascal, and I'm thinking these guys have done a great job of cloning Borland IDE.
Then I go to install a package, following the instructions. I get an error: "Fatal: Can't find unit LResources". I check and the unit is in the appropriate location, and paths seem to be set up correctly in the IDE. This really blows me away - these Lazarus guys are so good they are not only cloning the Borland IDE, they're also cloning the bugs :)