FlawedCoil, Katatonia has confirmed that they're playing a 60 minute set as Opeth's opener on their Facebook page. You should definitely go- and try to make it to Cleveland too if at all possible.
I've just been to a few shows before where an uncredited local band comes out before the main opener...
instead of just playing LFDGD straight through as the opener.
I was at the show last night. Katatonia was great. I had a good conversation with Daniel, who was very friendly. Talked to Jonas for a few minutes too. Both were nice enough to take a picture with me. Their set was the best, sound and playingwise, I've ever seen from them.
The CT show was great. I felt like Katatonia were underappreciated, despite their awesome set. This might be the tightest I've ever seen the band play. Really great setlist too.