gira e rigira per la rete, ho trovato questo:
http://forum.joomla.org/viewtopic.php?f=428&t=267521una parte: "This issue with the 'invalid token' and Joomla Poll is still a problem in 1.5.9
What I have discovered:
1. It only happens in a template override.
2. It is triggered when Joomla detects more than 1 person from the same IP address casting a vote.
3. If the cache is on, the error could be cached instead of the results page, so everybody sees "invalid token" when voting, for the duration of the cache.
So the logic for sessions/invalid tokens is obviously treated differently when a template override is present.
Turning off the cache will only stop the error being shown for the full cache duration, so while it minimises the issue, it is not a fix, and of course impacts the site performance.
Hope that helps
Pete"
col mio inglese maccheronico, dovrebbe essere un problema di cache da disabilitare e tempi di sessione...
domani al lavoro provo