During the last week I have heard stories of cheating on bungie.net, and have also been the victim of foul play. I played a dozen or so games and got 2 wins and 1 loss. My loss was a game where 3 guys played by teaming up all their units against me, getting a 3-1 advantage in numbers, plus the advantage of knowing they could trust each other. They played very well, advancing simoultaneously against me from all sides,while avoiding my probes. Still I think this was very dastardly, they played me with pretty much the express purpose of crushing me while ignoring each other. One of the players was called Timon, I recommed serious players to stay away from this guy.
2 wins and 1 loss, guess my rating should have improved a bit. However my ranking dropped a lot. How was this possible? Well for one my wins were not reported to bungie.net. I also played 2 games were nothing happened for more than 2 minutes and I quit. Both of these games were reported, as losses for me. So instead of gaining rank I lost rank.
There could be legitimate reasons for the non-report of my wins and my lockout of two games, but too many funny things are going on in ranked rooms that are not happening in unranked rooms. It all makes the chinese swim-team look like girl-scouts.
Needless to say, I am currently playing unranked only. Unranked is still quite nice to play and lag seems the worst that can happen.

Today I played a Bungie.net game, or rather tried to play a game. What happened was that the netmap - appearantly - loaded, the whole progress bar got filled up. However when done, instead of going to the unit trading dialog, it went back to the main screen. I discovered that this was due to lack of drive space to copy the map on. I did not get any error message of any kind! So in conclusion:
I am sorry, Highlander and who else was in that game.
Make sure you have at least 1 MB drive space free on your Myth-drive. River of blood, for instance, a pretty large map, writes a file called "submesh cache" which is 1.3 MB large.
To booth, if you do not have enough drive space to save films or games, you do NOT get an error message, you get a corrupted file. I have a film of Seven gates where my units stand around for ever, close to the end. Not very amusing.
I have also gotten an inordinate amount of "Disconnected" games lately. The computer waits a long time for other players and the rushes through the time, and you cannot move your units. Someone told me this is due to the host disconnecting. My assumption is that this could happen if the host had insufficent space as this would result in an involuntary disconnect.