I have updated the wicket libraries from 1.4.0 to 1.4.5 and now all pages with form don't submit. On the feedback panel appear an empty <li>, the form raise the onError but all components inside validate without errors. I've iterated over components in the form but all FeedBackMessage property is set to null. It's a bug, o from 1.4.0 to 1.4.5 there is something to change? Thanks