$_POST blank for self-calling form

[dirkschmidt]

I'm somewhat new to Joomla, so please excuse any obvious mistakes.

I've got a self-calling form that is supposed to set $_POST. When I access $_POST via JRequest::getVar in index.php it is set correctly. When I access it in the article itself (via Jumi) suddenly $_POST is not set anymore. I've tried this with Jumi as well as DirectPHP. The same code is working on my local testsite without any problems. Given that $_POST is set correctly initially and then further in the code suddenly changed I assume this is an issue somewhere in the Joomla stack (either a plugin, module etc.), rather than an issue with server configuration.

Does anybody have any advice where to start looking and what the issue might be?

Joomla: 1.5.6, Jumi 2.1 Beta 3

[dirkschmidt]

Never mind - apparently it was the cache being switched on.