NETRTLINK: Device not found moving from 3.2.21 -> 3.3.6, on 2 ethernet interfaces...??? (worse in 3.4)

I tried upgrading directly from 3.2.5 -> 3.4.4. Had two probs (the one mentioned in this email, and inability to set MTU size on the other card under 3.4.4). So, I thought to break it down -- first upgrading to current 3.2 (.22 at the time), then 3.3.6, and then 3.4.4. First was went

NETRTLINK: Device not found moving from 3.2.21 - 3.3.6, on 2 ethernet interfaces...??? (worse in 3.4)

I tried upgrading directly from 3.2.5 - 3.4.4. Had two probs (the one mentioned in this email, and inability to set MTU size on the other card under 3.4.4). So, I thought to break it down -- first upgrading to current 3.2 (.22 at the time), then 3.3.6, and then 3.4.4. First was went