Bless you Kathy!  This is the one thing about BV that drives me nuts.   Even if it's fall and pouring rain my Sims were constantly going outside to build sand castles. Blech!  Thanks so much for dong this one so quickly!

I installed 2GB RAM (up from 256MB) and my game flies.  No glitches that I can see, other than not being able to alter the build mode of Maxis vacation lots.  I wanted to change a hotel room into a bar and was unable to remove the hotel room door and replace it with a regular door or archway. If I build a vacation lot, either residential or business, from scratch I have access to everything though.  
Can't wait for game mods though!  If my Sims don't stop building sand castles I'm going to scream