LO 4.3 Base - problems with sub forms

Since and including LO 4.3 I've started having problems with sub forms

I have two tables Subscribers and Payments which are linked on Subscriber_ID.

I have a form Data_Entry" the main details of the form contains the data for one particular 
Subscriber from the Subscribers table. The form also has a sub form that contains the payment 
details for that subscriber linked on Subscriber_Id.

Upto and including LO 4.2.4  this has worked flawlessly for the past 15 months.

        Load the form and see the last viewed subscriber details with matching payment details - 
Correct.

        Select a different subscriber from a drop down box,  the contents of main form changes to 
reflect the new subscriber and the contents of the sub form changes to the new subscribers payment 
details - Correct.


Since 4.3 what I get is this -

        Load the form and see the last viewed subscriber details with matching payment details - 
Correct.

        Select a different subscriber from a drop down box,  the contents of main form changes to 
reflect the new subscriber. The contents of the sub form doesn't change  it still reflects the 
payments from the previous subscriber - Wrong.

        Restart LO.

        Load the form and see the last viewed subscriber details with matching payment details - 
Correct.

        Select a different subscriber from a drop down box,  the contents of main form changes to 
reflect the new subscriber. The contents of the sub form doesn't change  it still reflects the 
payments from the previous subscriber - Wrong.


So the work around is to select a new subscriber, see the wrong payment details. Close LO. Start LO 
and load the form and see the correct payment details - bizarre.

I've had a quick search in bugzilla but found nothing. Will have another search later today and if 
I don't find anything will raise a bug report with the above detail. Then flesh it out with the 
steps to take to replicate the bug.

In the meantime has anyone seen this or any thoughts on the matter.


Alex