Speex dev - May 2010 - Jitter buffer

Hi...

I'm trying the adaptative jitter buffer of Speex.

Anyone can help me? I don't understand because my application manytimes
return

"warning: jitter_buffer_get(): packet too large to fit. Size is "

I test my program over local cable net and i think that is impossible have 
packet lost or corruption.

I've looked the source but i don't undestand what happen and because 
jitter_buffer_get iteration return this warning.

thanks

Luca