When your Mac Sync software ONLY supports 64 bit Macs, then kindly SAY SO on the download page. Claiming to support Mac OS 10.6 and above is disingenuous at best when you ONLY support 10.6 and above on 64 bit Intel Macs.
Furthermore, making me go though multiple replies with your support staff to reveal this information to me is profoundly stupid, when it is a known issue that has been discussed by your customers on your support forums. I'm glad I researched the issue myself so I could bypass some of the back and fourth your support staff was trying to make me go through.
You know this is a limitation, you made a decision to not support 32 bit Macs and yet you make it obtuse and annoying to get this information. Every OTHER vendor whose software I've used specifically states when it only runs on 64 bit architectures, BEFORE you download it and try to install it. I can't run the latest version of Handbrake on my Mac, but their site tells me as much so I know not to bother downloading it.
A future Dropbox.com customer.