I'm not sure if this is a true bug since there is a work around, but here goes.
I am in the process of cleaning up my directory structure as follows:
...\Album Name - Disc xx</i>
...\Album Name\Disc xx</i>
I have a Filename - Filename pattern set up as follows:
%1\%2\%3\%4\%5 - Disc %6\%7
Now - this works fine on directories that have seven or more levels. However, if I reload a directory that has less than 7 levels and click on the 'Filename - Filename' toolbar button I recieve an error stating:
The application has encountered an unexpected exception and is in an undefined state.
I can work around the issue by going into the Options dialog and changing the default pattern.
Also - I realize there are better ways to do this, but this was quick and easy.