Ok, first of all - I've seen several posts, since the FAQ was posted, claiming that you can't make a jumping charge. What's up with that? You clearly can.
Secondly - what possible motivation is there for disallowing these types of manuevers? To make the game less fun? To prevent any dangerously cinematic or exciting situations from occuring? It seems similar to disallowing someone from buying a 5' pole, "because the PHB only lists 10' poles".
Now maybe I'm mistaken and this is just rules argument for the fun of it, in which case I'll leave you to it. However, this seems like an example of an attitude I've seen, that the best way to prevent brokenness is to weld yourself to the rules and disallow anything not explicitly listed in the PHB . Well let me just say - that's not going to fix anything. You want a balanced game? Then get familiar with how much impact things actually have and rule based on that rather than on strict wording.