I have lost faith in Adobe because they cannot get their products working on case sensitive HFS volumes. The problem has existed for almost a decade I think. The fact that one cannot install Creative Suite on another volume makes it even worse.
Slightly more sickening is that for some of their apps it can be fixed by simply renaming directories and libraries within the App bundle. I googled around for a bit a few months ago and got PS and InDesign working on a machine with Case Sensitive formatting. This sort of laziness just kill me.
This may be somewhat irrelevant, but what is the motivation for having a case-sensitive HFS volume? I agree that Adobe should support it (and separate volume installation) because these are edge cases that should be accounted for, but I've never heard the reasoning for having a case-sensitive format.
This is why I do it. To make my local dev system a bit closer to my (typically linux) deployment systems.
(I remember wasting a lot of time once on a rookie mistake where I had a Perl script with "use Strict;" in it instead of "use strict;", it worked fine on Mac OS (OS9, in this case), but failed in at-the-time-inexplicable ways when deployed on unix. I suspect my habig of insisting on choosing case-sensitive filesystem stems largely from that… And yeah, doing perl/cgi webdev on Mac OS9 was a really bad idea, I discovered.)
