Upgrading from MyFaces 1.1.5 to JSF 1.2 RI

When upgrading the example project I encountered 7 issues:

• Using the same tag attribute for a JSF tag twice was silently ignored with 1.1.5 and now throws an exception with 1.2
• Using less columnClasses than columns in a panelGrid rendered the remaining columns without CSS class with 1.1.5 and now repeats the columnClasses for the remaining columns with 1.2
• MyFaces 1.1.5 rendered either a name or and id attribute for each tag, so scripts could always identify them. 1.2 RI renders commandLinks with neither name nor id, imposing minor scripting changes
• MyFaces 1.1.5 updated the model with null, when a radio button not clicked and the bean property is a String, the 1.2 RI updates with ""
• 1.2 RI writes an exception stacktrace to the log when a phase listener throws a bug. MyFaces 1.1.5 was silently ignoring them
• When a bean implemented Map and a bean property was set through DI in faces-config, MyFaces 1.1.5 called Map.put(). 1.2 RI doesn't, so implementing a separate setter for upgrading was necessary
• When a property of a bean in session scope is set through DI (faces-config) and the property is a bean in request scope this would silently upgrade the ssecond beans life to session scope. MyFaces 1.1.5 would ignore this while 1.2 RI throws an exception

Thanks to Ganesh for identifying the differences.