Well, we discovered there were some definite issues that we need to address, before trying this again. Fairly minor issues, but enough of them that there is a fair bit of tweaking needed done to the editor config files before proceeding.
We (manta and I) will try again next week Thursday, at 5 pm EDT.
In the meantime, until we work out those issues so we can actually finish with the upgrade, IE 10 users, please remember to use the workaround I posted for you. Once the rte IS upgraded, you will no longer have to do that.