>>Ok, a little bit more playing with forms revealed that the problem exists for UNBOUND textboxes only. If they bound, then numeric textboxes and amount textboxes do not lose digits on Enter. But for unbound textboxes all forms show this behavior. Anyone can reproduce the problem? For me it looks like a bug.
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>>Thanks in advance.
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>How about binding the textboxes to form properties, even if just to get over this problem? That make any difference or do they have to be bound to table fields?

I was thinking about it, but it sounds like rather complicated workaround for this stupid problem.