0. attached is (will be) a zip file which contains a dBase file and a form document
1. place the dBase file in some empty folder
2. create a dBase data source pointing to this folder, name it "bug"
3. open the form document
=> you will get an error message that the content of the listbox could not be
loaded. This is okay, as the list box is filled with a SELECT statement which
refers to a non-existent table
4. focus the edit field for column "A", enter some text
=> the "save" button in the form toolbox is not enabled, which is wrong (the
record should count as modified)
5. focus the edit field for column "B"
6. with the respective button in the form toolbox, travel to the next record
7. travel back
=> the changes in field "A" have not been saved

The form seems to have lost the connection to the underlying table somehow -
though it is properly filled, it does not write back any changes.

If you remove the listbox from the document (or change it's list content, so
that no error occurs when it is filled), then everything is ok.

Additionally, if you omit step 5., then the changes are saved, too. But this
only means that the focused control is committed, but not all other controls,
which doesn't really help ....