Numeric Fields Disappearing (Forms 4.5)

I have a Forms developer having a problem with numeric fields on forms (4.5), Oracle 7.0.4, HP-UX 10.20, X11R6.

We have several instances of Oracle running, the problem crops up on several instances, but we have at least one instance that does not exhibit the problem. We can't seem to determine what is different about the working instance (everything should be equal as far as we know, obviously not).

When a form is populated, and a user tabs from field to field, the data in numeric fields (apparently) gets cleared when the field is entered, and does not get redrawn when the field is exited.

It does not seem to be an X server and/or font/colour issue, but I am not be 100% sure about that.

Any insight would be appreciated, TIA.

-- 
Richard O'Rourke -- My views are not necessarily those of my employer.
Raytheon
International Airspace Management Systems (IAMS) Vancouver, B.C.