here is the fix. I can confirm it works for me on Sprint at the time of this post.
1. download Arcsoft 5 0 94 128c
2. set up the settings for your provider ie sprint is
Code
http://mms.sprintpcs.com/servlets/mms
3. don't forget to connect via sprint at the bottom.
This needs to be done by going to the mail tab/inbox/menu/pics video options the select cdma servers and edit the settings there.
4. open registry editor...go to hklm, SOFTWARE, Arcsoft, Arcsoft MMS UA, Config, mm1, MMSCSetting, SprintMMSC(or whatever you called your default server) and change all 4 wap settings to 5120000. I also did the same for the sample servers.
there are three (3) folders, two(2) with sample in the name. change all three folders wap settings
4. You can now send without a problem.
5. For receiving. Once the message is downloaded, you can view it once the popup comes up saying the message is done downloading under the "view" option. However, to view it again after closing it, go to your e mail tab, tap "inbox" and swipe left or right to get to the windows text messaging tab. The message your received with the attached picture is viewable. Unfortunately, the pic is still not viewable under New HTC messaging app. At least you can view regular sms through the text messaging tab by tapping them instead of going to all messages like before with the "disable cab" Not perfect but a lot better than before.
all credit goes to crookdbill @ ppcgeeks. I just edited it for content and more peep friendly instructions.