Linking subforms in NAV 2009 RTM

I realize this may be a topic for the NAV/Navision forum but because this is a problem for us in NAV 2009 classic, and not in any other Classic version, I thought to post here.

Here's the problem:

We have modified our item card so that there is a list view subform on the item card showing all the skus for that item. The subform we've added is F5701 (Stockkeeping Unit List).

On that subform, there is a SKU menu button with the SKU Card (Shift+F5) hot key on it.

for Classic Nav 3.7b, and Classic NAV 2009 pre-release, users could open the item card, put their cursor on a SKU in the Stockkeeping Unit List subform, hit Shift+F5, and NAV would launch the Stockkeeping Unit Card (F5700) without issue.

Now, using Classic NAV RTM version (build 27808), when we do this, we get this error:

"A value in the filter '<stockkeeping unit.description>' in the Location Code field in the Stockkeping Unit table is too long for the field type.

Type: Code 10"

There was no change in object definition. Only a change in the finsql.exe file. So if my finsql.exe is build 27205 (20/AUG/08), everything is fine. But in build 27808 (5/NOV/08), the first released to market version, I've lost this functionality.

Should I not expect hot keys to work this way in subforms? Was it just luck they worked before, and don't now? is this something I need to have my partner resolve with Microsoft?

Thanks for any comments.