Panels + Views cache issue

Hi all

I'm building a blog with Drupal 7 + Panel 3 + View 3

In my project I built a view (blog) with two blocks:
a) one that shows all the articles, in which I defined a contextual filter (year+month)
b) one that presents a simple list of links with month and year of the articles present in the database. That links points to page 2) and they have href= /archivio/YYYYMM

and two pages:
1) /blog
2) /archivio/!data

In both the pages has been defined a panel in which are displayed the blocks a) and b).

Page 2) uses an optional argument of type string (!data) to pass to view year and month in which to display the items, in the format YYYYMM, using the variable %date:row in this context.

Now, clicking the link in view b) (ie February 2012) the page 2) displays correctly but then, if I click another link (eg. March 2012), the url changes to /archivio/201203, but the content of the page remains unchanged!
If I wait about twenty seconds and then retry refreshing the page, I finally see the right items.

From what I could see, the problem seems to be caused by the panel that keeps a cache of the page + context that shows me the same page even if the context has changed!

Note that I disabled all caches in panel items and views, but the result does not change.
Moreover, clearing the cache via drush or drupal, the pages still do not change correctly!

What can I do? Where am I wrong? Thanks all!