[Typo3] Strange behaviour after upgrade to last version

[Marc Valentin]

I think (not sure) that it is the extension "realURL" being the cause od 
this problem... Ho to get "_top" as target with realURL ?

Marc Valentin wrote:
> I use the multi language system and a frame based web site (based on an 
> old typo3 sample). Here it is : http://www.anthonycharity.org/
> The default language is english, and I show little flags to change the 
> language at the top of the page.
> My problem is that now, when I click on a flag (on the right frame) the 
> left frame doesn't disappear. It remains there. You can try. Any idea why ?
> Thanks.
> -marc-