[SunHELP] SunFire FIRMWARE versions 5.20.3 vs. 5.19.8

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My current firmware level is 5.19.5 and I am planning to update this 
code to ensure handling of the 2007 DST changes on the System Controller 
level as int turn to get things updated in general for the code.

Can anyone comment if it is best to stay on the 5.19.X release line of 
the Firmware or jump to the 5.20.X line?

Server is specifically a SF4800.
Solaris 9