Cumulus Support

I have installed the new beta version, which looks good and works well with twitter,

But i have a problem with highest minimum = -999
and lowest maximum = 999

will these reset after 24hrs or so of data?

Yes, you can't have a lowest max or a highest min until you've had at least one max or min. But if you've been running any version of Cumulus for more than a day, you should have those anyway. Have you not installed 1.9.3 to the same place as you had 1.9.2, so it uses the same data?