Thanks for your comments, everyone.

How do you report bugs in Knoppix?

And how soon are they normally fixed?

For the time being, I am going to use the default desktop (with the no3d cheatcode), and get used to using the mount command.

I found Konqueror in the Internet submenu, so I will be using that to browse my files (Settings > Show Navigation Panel). It doesn't mount partitions, the only problem is that you might think you're looking at an empty partition when actually it's unmounted.