I'm returning to cultivation of my scenery after a break and hitting a problem. The first minute or so of flight is OK, then I get an hour glass freeze that lasts for about 5 seconds then FS2 comes back to life but many of my cultivation buildings (mainly large industrial I think) are flickering like crazy. I had thought this was due to an overlap with some buildings occupying the same area as others but I've ruled that out now.
Update: Solved (I think) - Cultivation overlap with another airport using the same large area TOC file