I'm so glad that I am not the only one experiencing this.  I completely deleted CS6 and downloaded and installed it all over again. Still the same problem.  Then Adobe has the hide to keep emailing me about my month's trial etc.  I haven't had any trial period as the new version is unusable! I have written to Adobe but have had no reply.  How does anyone get anything fixed when no one seems to take any notice?

Thanks for your reply.

1. Yes, I am on a Mac using the latest operating system 10.7.4 (Lion).  I'm using a less than 2 year old iMac 27".  I have been using Dreamweaver for several years from about CS3  - before that I used Adobe GoLive.

2. Yes, I installed the trial CS6 without any errors.  I have installed it twice now.

3.  Yes, this is correct.  I have taken four screen shots for you to see.  The first one is one of my websites in CS 5.5.  The second is looking into the 'images' folder in CS 5.5.  The third shot is the same as the first shot but as seen in CS 6 and th fourth is the same as the second but as seen in CS 6.  You will see that the image files stop in the 'C's and the scroll bar is still close to the top so that nothing below the images folder will display when I scroll down beyond the bottom of the images folder.

You can see some of the missing filenames from the second photo.  They are all jpg files in this case although html and pdf files are missing further down.

The path to my local sites is ~user/Dropbox/Sites/sitename folder (I have three different folders for three different sites).

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I also found in the process of trying to upload these screen shots that you can't add images using Safari.  I had to use Chrome. The 'insert' button doesn't work in Safari.

This is good news but before I try it myself, when you say that the files weren't showing on the remote server, does this mean those viewing your web site can't see those files online? This could be a huge nightmare to fix.

I have just found two Cache.db files - one in a 11.5 folder and one in a 12 folder (I presume 11.5 must be CS 5.5 and 12 must be CS6).  I dragged them to the desktop in case I needed to replace them.  I opened DW 6 and checked the Images folder.  It is no different - still stopping in the C's with all the remaining files missing.  I tried refreshing, closing the folder, re-opening it but nothing would reveal the missing files.

Should I have trashed the Cache.db files?  Do they still work sitting on the desktop - I would have thought not.  Should I have trashed the whole folder which contained other folders and files?

I just switched to Remote Server view and the same problem is apparent with most of my image files missing.

I have deleted that .dat file but now I can't open DW6 to test it out.  It keeps asking me to register it.  How do I know that deleting that file has worked or not?

Thanks Kwint for this tip.  Unfortunately (or fortunately as it turned out), I bit the bullet yesterday, paid for the upgrade with my fingers crossed and when I opened it, all my files were in back in place.  I had removed that .dat file as advised nearly two weeks ago but as I doubted I would hear anything back from Adobe support who obviously just want our money, I took the risk.  Anyway, I am very pleased to report that everything is back in order as it was with 5.5 and I am just hoping all the bugs of 5.5 and previous versions have been fixed in 6.  That remains to be seen...