When trying to upgrade WP 3.4 on my PC (FROM 3.3) I get HTTP 500 error.
I have done it manually - deleted the files from wp-includes and wp-admin
and then copied the new wp-includes and wp-admin files.
After getting HTTP 500 erros I moved all the plugins to a newly created old-plugin folder and empty the plugins folder. This to ensure that no plugin has caused an issue. Doesn't work.
Any suggestion are welcome.