To add just a bit more information - I only notice this on binaries, never on very small files. I just tested it, and I can check in 30 new text files, but more than a couple smallish .wavs (~1mb) will cause the problem to occur.
I've also been using the same workaround (only checking in 1-2 files at a time), but it's unreliable. Sometimes it works, sometimes it doesn't. It sometimes seems to help if I close the client and re=open it.
It feels almost as if the upload is timing out when it tries to check in new files. If it takes more than a few seconds, the error pops up.
