[X4U] Console log question

[Art]

In checking my Console log (as suggested in another thread) I see the  
following occurring over and over again:

"Unsafe JavaScript attempt to access frame with URL http:// 
my.yahoo.com/p/d.html?v from frame with URL, ... . Domains, protocols  
and ports must match." (I've deleted several lines at the ellipsis.)

How unsafe is this, and can/should I do anything to eliminate this  
repeating message?"

Thanks,
Art


17" PowerBook: 1 GHz PowerPC G4
1 GB DDR SDRAM w. 160 GB Hitachi HD
Mac OS X 10.4.11 (Tiger) & OS 9.2.2 (Classic)