Due to some bugs in Pligg 9.8 registration was not working (the main one), the boxed one works.
To fix this bug update to Pligg 9.8.2 and then you have to patch mrtechie template in this way:
- overwrite the file "register_step_1.tpl" with the one from yget 9.8.2 default template (really it's safe)
- overwrite also the file "register_step_2.tpl" with the one from yget 9.8.2 default template (really it's safe)
- open the file "sidebar_modules/login.tpl" in mrtechie template and add at line #50 before form closing:
Code:
<input type="hidden" name="regfrom" value="sidebar"/>
here we are, registration will back to work at 100%, try and report back 
EDIT:
updated on 17th of Oct, now it's really 100% fixed!