There's some weird stuff going on.
I'm not sure why maxglide is seeing a Unix executable, but while checking my implementation, I found that while the [gigantic hash sequence] address of my folder on the Mac holding iSight images has stayed the same, the one for an external Linksys camera had somehow changed. I made a new alias and put it in Dropbox. It didn't work this time (!), though the folder alias and Dropbox pictures sync (even to my iPhone) for my iSight camera continues to work. (By work, I mean it will transfer pictures successfully to my iPhone and the Dropbox.com website.) Instead, what I see on my phone and in Dropbox.com is a generic file 507.1 KB in size.
The problem seems to be due to changes in the Extended Attributes and Resource Forks of OSX, as described here
http://www.pxc.me.uk/misc/dropbox_mac_use.html. A possible solution using Symlinks is shown here
http://wiki.dropbox.com/TipsAndTricks/SyncOtherFolders, but I have not tried it yet. Evidently different versions of OSX.n have different alias properties.
I know of another way to accomplish the backups using Hazel
http://www.noodlesoft.com/, and will start a new thread on this approach shortly.