not sure if this is databinding limitations or our usage of databinding but i.e. when unselecting "Create new project" in openshift wizard I instantly get an "error icon/message" saying "select an existing project to use with OpenShift" - this feels rather "abrupt" since the user haven't actually done anything out of the ordinary, he is just filling in the form.

i.e. in eclipse JDT it will just state "Enter a location for the project" with no error icon and finish disabled.

I believe Eclipse UI guidelines says the same "5.5 Validate the wizard data in tab order. Display a prompt when information is absent, and an error when information is invalid."

http://www.eclipse.org/articles/Article-UI-Guidelines/Contents.html#Wizards