Our fallback option enables you to transfer files via our server, instead of peer to peer. This will only occur when using either an older browser that does not support peer to peer communication, or a network that limits such features.
Of course this feature is completely optional, as we want to ensure the maximum amount of privacy. Let us know what you think of this feature and how we can improve it even further.
Additionally, we fixed a bandwidth scaling issue, that would in some cases lead to a 'lower than expected' bandwidh. It took quite some time to find the culprit, because it was in an unexpected and thus overlooked part of the code.
Note that this is still a work in progress, we hope we can squeeze out even more bandwidth by optimizing our algorithm.