Re: Land Vanishes After Placing Lot (blue rectangles)
This is a common error, but one I thought went up with an update...I could be wrong though.
What patch is your base game?
To vheck what patch you have...
For PCs: open your launcher and hover over the little base game icon
More Details can be found here: http://sims3.crinrict.com/en/2011/01/tutorial-how-to-find-your-game-version.html
For Macs: http://bluebellflora.com/ts3-on-a-mac/checking-which-patch-version-youre-running