Apologies for the title being a bit vague, if anyone has any better suggestions I'll change it.
I realise that with some applications that this behaviour is by design, but I think I'm seeing it with ones that this doesn't apply to. To begin with, I thought that this problem that I'm seeing was OpenOffice-only, but it's happening with TextPad as well (which, admittedly, I'm not entirely sure whether that is by design, I don't use the app very often).
OpenOffice:
Start a new text document, File > Save As.
Save the file in a location that isn't the default documents folder.
Close OpenOffice. Check Task Manager to ensure that all OpenOffice processes have closed properly.
Start OpenOffice Writer again. File > Save As.
On my computer, it's already showing me the folder that I saved the previous document in.
I asked on the OpenOffice forum, but didn't get much of a response, and the one that did respond said that it was showing the default documents folder on the second attempt as expected. Some people were complaining that they would like the 'feature' I'm experiencing

Office 2007 doesn't do it, nor does WordPad (as in, they act normally and show me the default documents folder).
What would be really handy is if someone here is using OpenOffice on Windows 7 64-bit, and would try this test for me.
I have spent ages uninstalling, reinstalling, deleting OpenOffice's user-data folder, downloading a copy of OO from a different mirror, monitoring OpenOffice with Process Monitor, and am generally fed up with this problem