We have just released a new version of J2top!
This update addresses a bug that appeared in combination with sh404SEF. When both extensions were activated on a site it happened that the page didn't scroll up properly but refreshed instead.
The new version does automatically recognize the presence of sh404SEF and adjusts itself accordingly.
You can install the new version on your Joomla! site without uninstalling older versions before! This will preserve all settings that you have made.
Please feel invited to share your thoughts and report any bug you find in our forums: http://forum.freakedout.de