I created an accdb using Access 2010, it opens in both Access 2007 and 2010.
The problem is that any changes made using one version are not shown in the other version.
I spent all day yesterday changing and adding things, I saved all changes, opened the file in A2007 and everything was fine, I then opened the file in A2010 and now none of the changes are there (even when opened in A2007).
On a side note: In A2010 I couldn't save the file as a mdb, I got the message about having functionality that isn't supported in mdb (which isn't true, and as proof I created an empty 2007 accdb, imported all objects from the A2010 accdb, and then successfully saved as mdb).
The problem is that any changes made using one version are not shown in the other version.
I spent all day yesterday changing and adding things, I saved all changes, opened the file in A2007 and everything was fine, I then opened the file in A2010 and now none of the changes are there (even when opened in A2007).
On a side note: In A2010 I couldn't save the file as a mdb, I got the message about having functionality that isn't supported in mdb (which isn't true, and as proof I created an empty 2007 accdb, imported all objects from the A2010 accdb, and then successfully saved as mdb).