Unexpected empty directory removal

Hi

I do not normally report things such as this and they are usually
"features", however this one seems overly strange to me as directories
and files are different things and I would expected a source code
versioning system to adhere to that.

Use case to replicate:

1. Have path/files/a.file exists (and/or path/files/*) on client A and
client B
2. Remove the physical files from the path/files/ directory on client A,
so that the directory is empty
3. git commit
4. git pull on client B
5. On client A an empty path/files/ directory exists on client B it has
been removed, meaning path/files/ no longer exists.

Is this the expected behaviour?  As if it is, I will definitely bear
that in mind and note that git will not make empty directories AND will
remove empty directories from all clients apart from the client that
emptied the directory.

client A: git version 1.7.0.4
client B: git version 1.7.1
git server: whatever github.com is running

Regards
Gary