Before I installed CS3 and its version of Bridge, there was never a problem getting Bridge to open. Like any other program, one clicked on its icon in the Quick Launch toolbar (WINEXP PRO SP2) and it opened. Now there is new risk, which has happened to me several times already. I open the new Bridge to use a feature or two the old one doesn't have. In this case I wanted to compare several images and change the labelling. I did it in new Bridge, shut it, and when I came back to reopen Bridge, neither the CS3 nor the CS2 versions would open. As happened before, I re-started my computer and then got into Bridge CS2. Once there, I saw that the labelling changes I made in CS3 Bridge had not conveyed to Bridge CS2, so I needed to repeat the same work again. On other occasions these kind of changes do convey between the two versions of Bridge. I expect they should, because the files and the side-cars are in the same folder whether accessed from the one version of Bridge or the other. Strange, inconsistent behaviour. Something must be causing this to happen on some occasions but not others. But I have no idea what it is. I wonder whether Adobe does - by now.