Uninstall adobe air, and adobehelp. You versions causes conflict with Master Collection CS5 versions
I found the solution...for me, anyway...
I have a new Mac Mini Server running Lion Server and Lion. I could not get CS5 to install and was getting the same "DW049" errors.
As a new(er) Mac user I am hesitant to start tinkering with my system drive, partitions, OS, etc...I saw a lot of forum responses all over the place discussing the migration of apps from a MacBook Pro, loading Snow Leopard on top of Lion, etc. etc.
I didn't do any of that.
I simply removed any old install files.
Updated Java for OS X Lion here: http://support.apple.com/kb/DL1421
Worked fine. Java update came out in July, apparently.
I tried this and it works perfectly! There was nothing o
n the Adobe KB?