You could've come up with a better answer than this one...quite nasty indeed!
Who the hell knows what custom content would make them disappear without being told it would do so?
I'm quite disappointed that someone on InSim would be so negative...and if this is how you respond to a valid question...perhaps this site needs a different person to respond.
DarkAmarath is not a moderator. This is simply a community member who decided to post in this thread. InSim is different than MTS2 in the respect that non-moderators post often in the Help Section. I am not a moderator as well, but I often venture into here to help others when my knowledge could possibly be of some use.
To the original poster, you should try removing your dressers and see if there is a conflict. Does this disappearance occur in all lots or specifically one?