Originally Posted by
robow
I'm glad I'm not the only one here that feels this way. Mine is a paranoia of the rear axle slipping and/or poor alignment adding something else that can go wrong to Mr. Murphy here.
Me too.
I wouldn't use a horizontal dropout frame for a derailleur-geared bike unless I had no alternative, and then I'd use a Surly Tugnut or similar device to prevent rear wheel slipping.
The short-lived Salsa Casseroll had this problem. I remember reading multiple complaints of rear wheel slipping on a forum, where the Salsa reps blamed it on weak QR skewers, and nothing to do with horizontal dropouts, as it was never mentioned.