The current beta version has the following known issues which we are working to correct:
Beta 10 corrects most issues that have been reported. However, because there are major sections of code in beta 10 that are brand new and haven't been thoroughly tested, there could be new problems that come up.
Also, please be aware that we may be releasing new betas on an accelerated schedule this week as we prepare for a final release.
Note that multisourced downloads are only possible through the WinMX Peer Network, and not OpenNap servers. Also, the new version is not compatible with the current v2.6, and while beta testing, the new network is much smaller than upon full release.