The update from 6.5.1 to 6.5.1.1 wasn't intended to adress either of those issues. It fixed a security bug. It made no changes to the log in or post mark system, it made no changes to image uploads.
As far as your image uploads, that is doubtless a permissions issue. You're likely running in safe mode, your server is running as "apache" or "nobody" and YOU own the directory. Nothing we here can do to change that behaviour. If safe mode gets turned off that problem will go away, but then you're open to a myriad of other problems. Another option would be run PHP as a cgi and run it through SuEXEC like perl does, but then you lose a performance. PHP is was and likely always will cause admins and end users to have to consider a large number of tradeoffs.
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