I downloaded a beta version yesterday ARC and noticed that my collision avoidance using 2 sonar sensors front left and right are not working the same any more ,the bot will randomly go left or right instead of the reliable Movement Panel Radar avoidance it had before it would turn for the best possible way to go depending which sensor activates when looking at obstacle or walls. It could be that I need to re-check my wiring but wondering if I should just go back to the last ARC version I had because I had this same issue with the last Beta I tried a few months ago and then it was fixed in the next release. The other thing I noticed was my older Terminator thread on this Forum is showing wrong date Jan 2001 when I try to add a new post and only says it is an edit from Jan 2001 instead of new today? I am ready to test my Bot outside but hoping I get the Sonar working better first.