I am in the process of doing some spring cleaning currently as some issues have arose...
On some pages when submitting an invalid captcha response you'll be presented with a blank page versus a proper error message; I'm not entirely sure what's causing said behavior, but I anticipate a fix shortly.
I'll be going through the error logs and checking various settings to see if there are any other cleanup tasks to be had.
I'm also planning to preform several service upgrades as well, but these shouldn't effect performance much (if at all).