Subject edits not accepting the new value ...
Author Tobias Giesen

very often in both TIB_Grid and TIB_EditEnh fields, when I change a value
and press Enter, the previous value is displayed again as though the new
value were rejected. Clicking into the field will then immediately show the
correct, new value.

I've been noticing this for a long time now, but haven't been able to track
it down yet. It seems like an IBO bug to me.