Hi,

I have a VF page in a site that inserts a new lead (among other things). 

When trying to create a Lead, I get this error:

EXCEPTION_THROWN|[432]|System.DmlException: Insert failed. First exception on row 0; first error: UNKNOWN_EXCEPTION, invalid parameter value: []

It works fine inserting a contact.

In my code simply insert a new lead user:

 Lead newLead = new Lead(LastName = 'TestLead',Email = 'test@prova.it', Company = 'Test Company');

 insert newLead;

I've seen the post http://boards.developerforce.com/t5/Visualforce-Development/BUG-Summer-08-Large-controller-leads-to-quot-UNKNOWN-EXCEPTION/m-p/75538. The problem looks like the same but I'm working on salesforce site.

some one can help me?