What exactly will happen with JComments if sh404sef is enabled?
Nothing specially. It allways worked as it should, without any problems. At least in my case.
Problem is that i have SEF links at whole site, except on a link to Jcomments.
I don´t have any sef plugin neither in sh404SEf folder nor in Jcomments folder.
If sh404SEF would at least have some absolute except option for extensions. Now i get link half SEF, half Joomla default. Something between, but it is working without problems.
I remember that i had found on Internet some time ago one working plugin, but cannot find it anymore in my HDD.