1. RWR discrepancies based on server platform. (KA-50 flying on FC2 hosted server, FC2 flying on KA-50 server). No AI nails/spikes/launch warnings in MP environment.
2. Mission corruption during/when connecting to the server can cause spawning in air, and other unlimited bugs (incorrect payloads, statistics anomalies, hangar doors not openning etc.), perhaps hash checking client's mission file upon transmission will resolve this. [more of a multiplayer code issue]
3. EOS switching to Radar ON depending on target aspect or loss of lock in Russian aircraft.
4. SU-25 flight model constantly banking left when there is no input (can not fly wings level), a major bug that has been confirmed by devs themselves in the RU threads.
5. Contrails not disappearing if the aircraft continues to stay marking...
6. Refueling operation does not halt if you turn the engines ON after it has already started. [Turn the engines off, request refuel, once you hear the pumps, turn the engine on]
7. Countless invisible terrain issues (sorry a bit vague, hard to pinpoint them until you are all of the sudden in F-11 view at which point a lot of $#!*%^!*@^#!(@*$%#^! is transmitted in joy)
--- just a quick attempt to write these out in no particular order ---