RouterOS 6.1 Webproxy script error

Hi! I have a very painful bug on my RB2011UAS-in after upgrading to 6.1 OS. All webproxy settings become the default twice or three times per day. And when this bug appears I can’t even enable the webproxy. I have found a log entry which is connected to this bug I guess (look into attachment). This error disappears after router restarting. All webproxy settings are restored with the configured values. But this bug will appears again in couple of hours. Please help me!

CPU load 100% when this bug appears. I think this is the reason of the problem. http://forum.mikrotik.com/t/bugs-in-6-0/67014/1 I have the same graph.

I have a same problem. Do you fix it?

no. downgrade to 5.25 is the only way to fix it I guess)