Cap't Bob, I agree with your thoughts and my P133 seemed to work reasonably well with Hearme.
The disconnects for everyone in our Hearme rooms are a new phenominum. The have been common in the internet wide rooms for some time but most of the occurrences can be accounted for by users booting the room. This can only be done using the old hearme plugin (the trick is to set a user name of something like 2500 characters long) and while it can be used on certain pages, Aine's site should force the download of the newer plugins, besides which I can not imagine anyone sabotaging the Mudcat rooms. I can only imagine this is a problem with Hearme themselves.
I still fail to see any reason to consider these new disconnects to have any connection with inability to send text that WW is encountering.