Missing GameObject properties for upgraded project


We've been working with unity 3 since the betas, and I now noticed that the gameobjects in my project do not have the static flag for changing in the inspector, nor do they have the "Tag" option. I created a new project and the gameobjects have them. I tried to create a new scene in my project and the gameobjects over there don't have them.

Is this a known bug? Is there a workaround?

In my case it has been caused by a custom inspector for the GameObject type. After removing the inspector class from the project, the tag, static and layer properties reappeared.