Heck, I usually wait a month or two before an upgrade and but this time I made an exception and boom, headshot! I doubt it's the upgrade issue though, I've an old box with the previous build and it's just as slow.
Same problem here. Goes out for a min or two. Or lags completely. Symbol: ES TWS version 862.9a Java: 1.5.0_08
IB bulletin: Tue Oct 10 09:52:11 2006 EST AMEX BOX,CBOE,ISE,PHLX PSE market data maybe delayed or unavailable.