I have been playing this map a lot lately, and this is what I have found:
1. Geysers are incorrectly "owned" by player 1. Should be owned by neutral.
2. Buildings cannot be placed directly next to a refinery. Only exception for this is Zergling spawner.
3. The Zerg worker will collide with buildings and have to go around them, unlike Terran and Protoss workers, who fly over the buildings.
4. The Colossus and the Siege tank can attack the Planetary fortress without it being able to hit back. (might be intended?)
5. Banelings will not directly attack the Photon cannon or the Planetary fortress.
6. If one of the Overlords decide to stop exactly over a Photon cannon, it cannot generate creep and will simply stand still over the cannon until it dies.
7. Dont know if this was fixed in the latest version, but in the previous one,
sometimes when a player on your team left, their income would continue to generate AND be transfered to you, giving you double income.
8. Minor Graphical Error: Stalker spawner is missing its animation when it is building.
9. Minor Graphical Error: Marine spawner/Barrack still do normal size scorch marks on the ground around it.
10. The indicator at the top to the right, showing who controls the middle, is blocking the resource trade button.
11. Spelling errors on the Loadingscreen.
That is all I can think of at the moment.