Need a WordPress PHP Guru

I have a WordPress site that has some issues that need fixing. The following 3 issues need to be resolved: 1. Sometimes it won't load in (blank white screen) 2. There is an online assessment that doesn't load in when I upgraded to WP 3.1.1, so I had to rollback to the previous version in order for it to load. ~I would like you to update to the latest version of WordPress and ensure that the assessment (questionnaire) still operates properly; plus please update and test the 7 outdated plugins. 3. The site has an SSL certificate, but the "https" shows a red line through the https in the URL bar on a few of the pages (in Chrome only). Thank you. Sara