Avoidable aches?

[Browser]

As well as the above recommendations, when you are riding take the time to check and see if you are holding your shoulders tensed. I find that I do and have to make myself relax them. As was also said further up, a slight bend to the arms will help drop your shoulders, though it will put a little more load on your triceps.

 

[Sittingduck]

Yup - like the others, I would say the frame sounds too small. You might be able to improve position by getting an adjustable stem though. I have a System-Ex one on my hybrid.