G2 Real Player and squid.

We are using Squid 22S5 to proxy http, without any patch since more than 6
month.

Clients use IE and G2 RealPlayer to surf the web. G2 is using the Squid
http proxy to reach Internet.

For example, on this URL :
http://download.imix.com/download/topsongs.asp

We can't preview any song (using the Preview, not the liquid Audio sign).

Does any one with S 225 experienced the same problem ?
Does any patch could be useful ?

Thanks for your help, before I have to look more deeper with sniffing the wire.

--
Yomler.