HP OfficeJet 7200 / 7400 network problem

First, I dislike all-in-ones. The concept is good, but they never do exactly what you want. Second, HP has really undesireable AIO drivers. It tries to be too smart, do too much, and end up delivering much less then you expect. Also, do they have to make 10 programs run at startup!?

OK, here's an observation. I've worked with both HP OfficeJet 7200 and 7400, and have noticed a particular problem. They either don't like to work with the 3com IntelliJack NJ90, or they don't like to work at 100 Mbps / Full Duplex. On both machies, at 100 Full, would fail to print or scan. Go to 10 / Full, and it's ok.