Emu XL-7 & MP-7 User's Group

Hi all, I'm Dr B and am a pround owner of a new MP-7; new to it but 
not Emu in general.  Just curious: what is the most current operating 
sys available for this unit? It boots up as v 1.31.  I've also been 
hearing a few prominent clicks and pops, mostly in patterns and some 
presets when on arpeggio. Also, when playing a pattern (ie Soul 
Survivor)I get some prominent drop-offs, like someone "slowed the 
record" very briefly, then all's OK.  Are these OS-related bugs? 
Should I reload the soundset?  My only beef with Emu over the years 
is spotty customer serv and supp.  Thus I rely on user groups for 
help. TKS in advance for any help and/or replies.   DrB