I have Lightroom 4, Epson 3000 and a Mac Pro computer with Lion 10.7.4
I've got a problem with the Print Settings and Media Type. Every time I select the selection box to select a different paper type Lightroom crashes. The selection options on the prints setting has changed from what I had. I've searched all over thinking I made a setting that caused this.
I've attached the print settings.
I've got the same thing in Photoshop CS6 on the Mac Pro. I have a Macbook Pro with Lightroom 4 and I do not have the same problem.