As far as I can tell, the plugin is trying to allocate huge amounts of memory, leading to a memory breach. My error log contains the following:
Out of memory (allocated 32768000) (tried to allocate 36000 bytes) in /home/theyogad/public_html/wp-content/plugins/wordpress-https/lib/WordPressHTTPS/Module/Parser.php on line 424
Out of memory (allocated 34340864) (tried to allocate 7680 bytes) in /home/theyogad/public_html/wp-content/plugins/wordpress-https/lib/WordPressHTTPS/Url.php(482) : runtime-created function on line 1
Haven't started looking into the code yet, so no idea what causes it. Any insight/advice would be much appreciated.