In the published version of the paper:
<BR>
<UL>
<LI>
Peter W. Michor, David Mumford: 
<STRONG> An overview of the Riemannian metrics on spaces of curves using the Hamiltonian approach.</STRONG> 
Applied and Computational Harmonic Analysis 23 (2007), 74-113. doi:10.1016/j.acha.2006.07.004.
</UL>

the following error has occurred:
<BR>
The horizontal geodesic equation in 3.6 should have an overall - in front of 
it:
a_t = - \frac.....
<P>

The version on Peter Michor's homepage has been corrected.