Fatal error: Allowed memory size of 8388608 bytes exhausted…What is that??
Platinum SEO, like its predecessor – All In One SEO, uses output buffering to rewrite the titles, for this to works it needs memory. There’s no way to optimize that much more, and on most hosting setups it just works which leads me to the conclusion that there are some companies who are just skimpy with memory. If the above error appears on admin pages, it’s not even output buffering related. I’d recommend switching to a host that can provide sufficient memory or disabling some plugins.