Regarding the access as normal user fixed for me too.
Starting application (gthumb) configured through
System/Preferences/Removable Drives and Media/Digital Camera still not
working - but that might be a different issue.
--
Normal user can't access USB camera Error (-53: 'Could not claim the
I can confirm this (IXUS 55 and EOS 20D).
Workaround proposed is good enough to get access to the pictures as a
normal user. However, it does not fix the automount problem I have -
configuration in System/Preferences/Removable Drives and Media/Digital
Camera does not have any effect - configured