open the text box and type 1 2 3 4 5 6 7 8 9 10 11 12 with the spaces in-between; hit enter - do you get 1 -> 12 or is there some additions?
Using version 5a554 - latest
I get 1 through 12. Could you provide more information about the problem you are seeing?
Marlin
I get the following - see attached image…This is using helevitia, curves, size 3mm no bold nor italic - by typing 1’space’2’space’…up to 12 it is on a Macbook pro retina 13 i5 2.4G running 16gb ram - on rhino version 5a554
Ah. You are running the TextObject command, not the Text command. I see this now. Logged as a bug.
Cheers, 
T.
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