--- Operating System, Graphics card ---
All

--- Blender version with error, and version that worked ---
2.68a

--- Short description of error ---
Changing the value for Frame Rate doesnt change the length of the audio strips

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
Open a new file. In the Sequencer, import some audio strip (can be a movie). Adjust the Frame Rate to a different value. The length of the audio strip dont change.