After installing 8.5.3 and the newest ext lib in designer, I am getting "unknown tag xe:ajaxBlock cannot be used as a control" and "Unknown property rows. It is not defined on tag xe:addRows/xe.listViewColumn" in the xpagesext.nsf.
Did I do something during the upgrade? I'm showing in Application Management that the version is 8.5.3.20120320-1003.
Any ideas?