Hi I also had a problem and the whole site went down after the new install. not straight away but not soon after (think it's testimonial but not 100%sure). did a old database backup and got things working. it had jd testimonials on it (back end) and seemed ok. then published the module on my home page and it worked,but found after about 10 minutes the site was unaccessable from front or back end again. (hosting site said "thing I've noticed is that, your joomla installation doesn't render any output") uploaded the old database file and all working again and it ok. the only thing i can put it as is the module as all the backend stuff works ok. I have latest virtuemart and joomla. did'nt know if its sef problem (i'm using artio sef with virtuemart plugin). Its not a great loss as i'll most probably copy/paste their review into a content article.
