I know someone over at XDA was working on a version of Odin that had both regular bootloaders and didn't soft brick 1010 phones. However, I can't find anything else on this now. Has anyone heard anything else about this?
I have not heard of a problem with a 1010 phone. Are you by chance referring to the 3-button fix fiasco when GB was first released? There was a special 3-button fix version of stock firmware that when run on a phone that had the GB bootloaders on it, would cause it to brick. This was never a version problem though... never heard of that; never heard of an instance that Odin would not work. Do you have a link describing the problem?
I do not think so. I think you are getting garbled information regarding the 3-button fix back in the first leak to GB days. Everyone that flashes back to stock, flashes the eclair/froyo bootloaders, and they have to use Odin to do it.
The special version that only takes one, seems to be referring to the 3-button fix version of stock firmware. This version only flashed one of the two bootloader pieces, and if you were flashing back from GB, you ended up with half a GB bootloader, and half eclair. This resulted in a brick- one of the only ways I am aware of this happening on a Captivate. The real problem with this, is that the 3 button fix was considered the safe way of returning to stock, and it was... until GB came along. Under no circumstances should it be run today.
I do not think you have need to worry about anything special. But I do not know everything.