Stuck on White Screen Of Death After Database Upgrade to 3.5.2

About a week and a half ago I upgraded from 3.5.1 to 3.5.2. All went well until the screen where it says I need to upgrade my database. It then hung on the White Screen of Death (WSOD). If I try to access the admin section by any means, it always prompts me to upgrade my database again and then shows the WSOD. The site functions for visitors, and I can access the back end through the iOS app, so I can post, manage comments etc, but that’s it.

You can visit the site at:
https://toomuchglass.net/

Since this happened, I have done the following:

1. read a lot of forum posts and blog posts on this issue; unfortunately this problem seems to have a few dozen causes and what works for one person likely as not won’t help everyone else so everything I tried has failed to solve my problem
2. deleted the UPGRADE folder, which was empty
3. deactivated all plugins by renaming the Plugins folder
4. changed the theme to Twenty Twelve by renaming it to what was my active theme
5. checked my error logs and found numerous “illegal collation errors” relating to my database. I then used PHPMyAdmin to change all collation setting in my WP database to “uft8_general_ci”. Some of them had been set to a “latin,swedish” something or other. I had high hopes for this as it actually involves the database but it did not solve the problem, although it did keep the error from showing up any more in my error logs.
6. manually reinstalled WordPress by replacing every directory and file except wp-config.php and the wp-content folder using FTP

I have also made sure to periodically clear my cache and cookies to make certain that my browser loads the page fresh and isn’t showing the WSOD by default.

Since fixing the illegal collation error, my error log has not generated any new issues, except some that showed up while I was manually reinstalling all the WP directories per item 6 above. Since I finished the re-installation a few days ago, there have been no new entries in the error log.

Also, note that I currently have plugins turned back on because if I don’t, I get a ridiculous amount of comment spam without Akismet to block them. But I have periodically turned the plugins off all throughout this process to keep checking.

Finally, I temporarily added some text to my .htaccess file to show an error when you try to access a page and there is a problem. When I did that it displayed:
“Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [email address redacted] and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.” I have since changed my .htaccess file back to the plain WP default.
I upgraded the site many many times previously without any issues, running WP on this site since October 2009, whatever version that was.
Thanks in advance for any and all help.