The small dollar website also was a good reference for the 1999 VIP strikes for the 2000 Sacagawea coins.
(http://www.smalldollars.com/dollar/page22.html)
The article has some additional info, but nothing earth shattering. In my opinion, this condition probably didn't catch on in time. I personally don't know any modern small dollar collectors at all - minus me doing a PF69 Sacagawea set.
I think the edge lettering craze that is dying on the vine may have been the fruit of all evil. The sheer amounts of the common ones made all the collectors simply say "oh hum" and many people pass on even looking for anything additional on the small dollars =\ OR they simply looked at edge lettering until their eyes crossed and didnt bother looking for anything else.
IF it was probably a tooling issue and if so, it was probably a single die. I know dies can last about 325,000 strikes for a quarter, and the dollars are close to that same size. Problem is we don't know if the elongated ray was there for all the strikes or was taken out of the machine, maintenance was performed on the die and placed back into service for a while. There are a lot of "unknowns".
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