T5: 5.0.10 exception report has no detail

[Geoff Callender]

Is anyone else seeing this?  The exception report page in T5.0.10 has  
no detail - I'm getting only a heading and the exception, eg.
An unexpected application exception has occurred.

Render queue error in BeginRender[examples/jodatime/1:pagelink]:  
java.lang.ClassNotFoundException: caught an exception while obtaining  
a class file for jumpstart.web.components.DateMidnightField

Cheers,

Geoff