I am running version 5.4b and have parts of buildings missing.
This link shows picture of one building with missing parts, there are other buildings the same way: https://www.box.com/...l3q616pxxfu6q29
The problem is in file BR2_KSKF.BGL, I removed that file and restarted FSX with original BGL and it was ok.
I rebuilt the MyTraffic scenerary, etc and the problem is still there.
Thanks in advance.