QUOTE(rosfrog @ Feb 9 2008, 02:07 PM)

It's more likely that they're just beginners having beginner type problems, that's all! Unless the bridge is really flat and you can't bow on one single string, then the problem simply comes from them - it's a very common beginner problem (and one I'm encountering again for the first time in years since I've got my new five string fiddle and the strings are not in the same place on the bridge - tis very disconcerting!)
Allan
Yes I agree.
One of those things, and as soon as you've cracked it you then have to learn to double stop, which all of a sudden is then impossible