For anyone interested, I have put together a simple patch file which removes the "JSON inval data" and "JSON key 'xxx' not found" error messages in your log window while you're waiting for your rig to be rented.

Note that you need to be able to compile cgminer (or sgminer) from source to use this. I'm on a Linux box and don't have the tools for compiling a Windows binary. Also, the patch completely disables not only JSON inval data error messages for Betarigs, but gets rid of them completely. I've never once seen this error thrown on any pool other than Betarigs, so it shouldn't be a problem. Using --more-notices in Kalroth's build re-enables these messages.

The zip file includes patches for the following miner sources:

• cgminer 3.7.2
• cgminer 3.7.3 (Kalroth)
• sgminer 4.0

Download from https://app.box.com/s/9l8ydm9q6f9vttt7b4mx

Enjoy!

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