[Zope] Any restrictions known submitting formular data to python products?

[Ulla Theiss]

Hello list,

When I create very large forms and try to submit them to a method of a
python product the 
submit-botton doesn't react at all.

When I reduce the forms, it works again.

Are there any restrictions like a maximum of form-items known? 

Thanks in advance,
Ulla.