iCab does not handle login forms properly

Try changing the "Browser ID" in iCab's settings to "Safari (iPad)". If that doesn't do the trick, try other ID's until you get the desired result. On any web page , when you have forms to fill in, you can click the arrow button (top left) to allow the "save form" function. This way, the next time you go to that site, you won't have the hassle of re-entering your info.

Hope that solves your issue.