Elxis 2008: Firefox - I.E. problem (?)

[rentasite]

I have an installation of "Elxis 2008.0 Olympus-DEV" and i observe something strange.

Some people with Internet Explorer and some others with Firefox (2.0.0.11) see the site (frontend) showing a "Warning: There are no items to display".

I personally see this message with I.E. 7, but with Firefox (2.0.0.11) i can see the frontend normal with content published. 

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[datahell]

Read this if this is the issue:
http://forum.elxis.org/index.php?topic=1660.0