System automatically reboots after the downgrade. db is configured the same way. Attachments are being stored as files. I can upload small attachments just fine, anything under 100kb Once they get bigger it shows as a broken image when viewing the thread in vB.
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Plus the other issue: Invalid User Specified when trying to apply access masks.
These seem like issues related to php 5.4 but downgrading didn't effect any change.
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And I can see in my control panel (for the webhosting) that I am indeed downgraded