I do not have light flow installed, but another app called intelli ring, which manages notification volume. As soon as I turn that feature off, I can use the new Swype beta without any problem. But it was never a problem with older versions of Swype. Please fix...
I have LightFlow... I'd rather keep it enabled for now and just not update Swype for the time being. I had it and had to restore from a backup to get it working.
I also have Light Flow and experienced the same problemes on my Galaxy Nexus 4.1.2. After turned off Light flow, Swype is working again.
Confirmed: switching off "LightFlow" in accessibility allows Swype to run. However, this was not an issue with 1.2, and I also consider both apps to be essential to my phone usage.
Jacob, perhaps you guys can install LightFlow and figure out what the conflict is? I'll email the developer and notify him. He's been very receptive in the past.