Problem with AJAX and CI cache enabled: The response content is only displayed the first time

[eluser]luismartin[/eluser]
No, I think I didn't explain myself right. I didn't mean to say that's the way CI should do, but the way CI seems to be strangely doing (to not dump the output into the file at the first request, when the cache file is created).

When the cache is turned off and deleted everything works perfectly. So, what else to do?