>>Cetin,
>>
>>FWIW, I don't consider this a bug, but rather by design. When working in a modeless environment, the user should have the ability to shift back and forth between forms at will. To me, refusing to allow the user to do this short-circuits the modeless design of the system. JMO.
>
>Probably. But unfortunately it doesn't only exist for form switching + the behavior on return to form with valid is not same across versions. The side effects come to surface when valid is used in a grid. Formerly you could easily switch to another control on the same form with a hanging validation in grid. Now you can't, however if you switch to another form and come back you're lost in space :) Cursor gives no clue where you're and setting focus back to grid is really problematic.
>Anyway I don't accept it as a bug either (and I do:) but a design issue.

Cetin,

It's really a two edged sword. Do you violate the principles of modelessness or do you follow them knowing things like this can occur? I'd opt for the latter since a workaround can probably can be implemented fairly easily where necessary.