hook_form_alter causes 302 redirect - Big issue for AHAH calls!

Hello

I'm using contact_forms in a project, where I need the to make som dynamic changes to the contact form via AHAH.
I have my own module to do that, but contact_forms is causing major problems.

Because this module asumes that the path used to render the form is 'contact' I can not make any AHAH calls (which are definitely not in the 'contact' path) it causes a redirect.

I'm attaching 2 patches, one for the 1.12 and one for the 1.x-dev

What is the logic behind it:

We want to alter the form only when there is a second parameter [arg(1)] which corresponds to the category of the message.
Once we are in, we save the category in $form_state['storage']['contactform_redirect'] so subsequent calls know we have a category, regardless of the path used to make the call
For every other call (those made via AHAH) we do not check the path but we check whether we have a category set in $form_state['storage']

So basically we alter the form if it is beng called from /contact/* or if we have $form_state['storage']['contactform_redirect'].

I haven't tested the patch for the dev version, but the one for 1.12 works.

I urge you to commit this, since AHAH is being used more and more everyday and believe me, it spent hours trying to find the problem.

Cheers