There is a trim of this field before it is saved to options. The problem is that a "space" (chr(20)) is something a user may want to ignore. Workaround for users is to put the space anywhere except at the first or last position.
We dont use any trim-function to remove leading or trailing spaces at this option BUT after some investigations we found out that the windows api function we using for writing/reading ini-files does it automatically. it looks like some devs at microsoft thought it would be a nice-to-have feature and there is no option to deactivate it...
Anyway, we have fixed the problem. Thx for the feedback!