Hi there, I have created my own Media Type and created a field with the alias 'guid'.

I have also intercepted the Media_BeforeSave event in AppBase.  In the code I'm creating a new guid and assigning it to the guid field. However, when the Media Type is re-displayed on screen, (having clicked save and triggered Media_BeforeSave), the Guid field in the Umbraco GUI is not populated with the latest value assigned by the code.

If I reload the Media Type, then all is well, because it's re-retrieving from storage.

So is there a way to persist data with a media type which the user/content editor does not have access to?  Or is there a way to force umbraco to reload the Media Type after save?

The problem is that if someone clicks save twice, then we lose data... 

thanks for your help

Kris