Every once in a while while working on customizing a screen, I get the following message:
 
 
Invalid viewstate. 
    Client IP: xxxxxxxxx
    Port: 1743
    Referer: https://www.methodintegration.com/method/Designer/DesignerCallBackFunction.aspx
    Path: /method/Designer/DesignerCallBackFunction.aspx
    User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:6.0.2) Gecko/20100101 Firefox/6.0.2
    ViewState: /wEPDwUKLTg4NjI0NTYxOWRkfleraWY5XJzFEFmB7kFSdf4qcPlOBsGC1o142085e8s=
 
 
Any thoughts on what may be causing this. After getting this I have to log out of Method to clear it.
 
Rolf