BuddyPress.org

If this is in regards to making a new blog post, than unfortunately that falls more into being a WordPress MU support question than one we can accurately diagnose here.

However, I can tell you from experience that I’ve never experienced any issues saving even extremely huge content and HTML element heavy blog posts.

(I’m going to change this to “not a support question” since it’s a little out of our scope, so that no one else sees this as a BP issue.)