In Semper Fi campaign Mission 4, theLAV-AT-A2 have a range of 447 meters (exactly), after which it says "no line of sight" regardless of whether or not there's anything blocking LOS.
I ran into this problem the last time I played through the marines campaign when CM2 was first released, before it had been updated with 4.0 engine features. The range problem showed up on subsequent missions of the campaign- the bug doesn't effect LAV-AT's in quick battle however. I'm thinking this problem is just me because I can't find any other posts regarding the issue.
This is a new installation of CM2 that was 2.02 without any patches having to be installed.