There is currently a beta for both Windows and Mac OS X. It only concerns the console (command line) version at this time. The official thread is here: http://forum.folding-community.org/viewtopic.php?t=6315 The changes for version 4.00 are as follows: Changes in F@h Client v. 4.00 -------------------------------------- - Configurable minimum checkpointing frequency (3-30 minutes). (In GUI, controlled with a slider.)* - If client run with verbosity of at least 5, FahCore_78 will print out a message whenever a timered checkpoint occurs.* - -configonly flag added to configure then exit. - -oneunit flag added to exit after completing one unit. - -forceSSE flag added. Returns -forceasm to its former meaning of forcing assembly generally, and takes on the function of forcing SSE specifically.* - Warnings printed if -forceasm/-forceSSE flags given. - Benchmarking not done except at start of normal operation (for example, not if only configuring, listing queue, deleting unit, etc.). - Warning if attempt to run client with Machine ID of already running client (catches most common cases, including if running same client twice) - Web site printed updated. - Upon finishing a unit, if fails to return the result but succeeds in getting new work, immediately tries sending all results again. - Checks user name and team number for legality of use in statistics. (In GUI, gives popup error). - Queue info properly outputted to FAHlog.txt. - "Ask before connecting" change on Linux -- ignores typeahead and asks for "C" - Proxy password written out in binary (upon reconfiguration) - Assignment/work server request authentication - Send all message altered ("sent x of y" if x not 0, or "no units...") - CPU usage default of 100 printed out during Configuration. - Tags in MyFolding page changed to better adhere to HTML standard - Maximum machine IDs raised to 8. - Upload and download bandwidths estimated to send to AS. - If fails to post data, includes server and port in message. Also outputs HTTP status code (before this was only done if I.E. settings used). - Bug fixed where performance fraction could exceed 1. Of interest to Genomers: - Batch networking option for G@h (network only when less than 2 units ready to work on or more than 5 results to return, and when network, both get up to 10 units and send any results). - If set G@h preference, reflected in GUI title and acknowledgment message. Windows specific: - Version information added to executables. Windows GUI specific: - Can select and display any GIF file as a logo, and set a URL for the logo to link to. - Can add any text to displayed alongside the program title (perhaps something related to your company or team). - Browser support for more non-Explorer default browsers. - Bug fixed where current.xyz sometimes wrongly deleted. * Items with an asterisk require FahCore_78.exe v. 1.53 to be functional -- certain work servers are already forcing downloads of this core. Remember that using a beta means that you're willing to lose work and that your production may decrease. Use at your own risk or just wait and watch others take chances.