OS X 10.9 network hanging bug

When copying certain files to a network volume on OS X 10.9, Finder (or indeed Path Finder) will copy the first 12 KB and then beachball for minutes before eventually completing the transfer.

Our testing has indicated that this seems to occur when overwriting files from a local disk to the network volume and seems to only occur with .app application bundles. We believe this may be something to do with resource forks because it is rare for files other than applications to have them and network volumes do not support them. It does not occur on file transfers between the same network drive or from one network drive to another.

It's a nasty bug because it not only causes Finder to hang for minutes but can also affect all other applications using files on that volume. It has even a couple of times completely prevented any network or internet access at all for the duration of the file transfer.

We've reported this to Apple and are waiting on a fix. In the meantime, the easiest way is to either delete the destination file and then copy it or compress the .app bundle, copy it and then decompress.