[Plugin: petition] Conflict between plug-ins to get form data

Hi,

I have a blog on which I need to use several plug-ins. Currently, my try is to use petition and mailpress plug-ins. But I am facing a huge problem: if two extensions are proposing a form (this is the case there), the POST are taken by both and interpreted by both… even if only the form of ONE extension is available in a given page.

Tipically, I installed petition plug-in (latest version) and it was working fine. Then I installed MailPress for a mailing list subscription (I tried some other, but I am always facing the same issue). When submitting the subscription for MailPress, I receive an email from MailPress plug-in (that is normal), but also another one that says I signed for a petition (obviously coming from petition plug-in).

Or course, the email coming from petition cannot be used (wrong link as there was wrong data from the form). But I just want that ONLY the plug-in concerned by a POST uses it to avoid cross-plug-ins side effects. Does someone know how do to?

Thanks for any help.

Regards.