Mine downloaded automatically a couple of days ago.
I download all my updates manually, but this time, like the last one, for 10.0.1, I relied on the incremental update. As I had mentioned before, since v.3, I think, the small updates downloaded, I selected to apply them, the program went through the motion, and then informed me that the update could not be applied, and the entire installer had to be downloaded. This behavior did not occur this time. I, never was given the option of downloading and installing the entire installer, until I uninstalled the program. The profile was fine.
I don't know what happens when there is an automatic update, or if I had issues because I was trying to update Seamonkey, Firefox and Thunderbird, pretty much, at the same time. Only Seamonkey informed me that there was an update. Neither Firefox nor Thunderbird did.
UserAgent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20120216 Firefox/10.0.2 SeaMonkey/2.7.2