(Don't) Lose Your Photoshop Work

I'm doing my image editing using Adobe Photoshop Lightroom 2.6 and Adobe Photoshop CS4. For the most part I'm very happy with this combo. Here is just a warning for you so that you don't lose the work of several hours like it happend to me ...

After you choose "Edit in Photoshop CS4" in Lightroom NEVER save the file in Photoshop CS4 under a different name than the one determined by Lightroom (always use SAVE, not Save As!). Even if you first save the file under the name given by Lightroom and afterwards save the file under a different name the first file will be overwritten!
I did some complex image editing in Photoshop, saved the file and then resized it for the web, saved it under a DIFFERENT name but in the end the original multilayer psd file was overwritten. Since I first thought it was user error it didn't just happen once till I found out that it was a "feature" ...

If you want different versions of your file save your work in CS4 and then create a copy using the Lightroom functions.