Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release candidate for the 0.2.1.x series. It lays the groundwork for further client performance improvements, and also fixes a big bug with directory authorities that were causing them to assign Guard and Stable flags poorly. The Windows bundles also finally include the geoip database that we thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles should actually install Torbutton rather than giving you a cryptic failure message (oops). This is a release candidate! That means that we don't know of any remaining show-stopping bugs, and 0.2.1.18 will be the new stable if there are no problems. Please test it, and tell us about any problems that you find. https://www.torproject.org/download.html.en Changes in version 0.2.1.17-rc - 2009-07-02 o Major features: - Clients now use the bandwidth values in the consensus, rather than the bandwidth values in each relay descriptor. This approach opens the door to more accurate bandwidth estimates once the directory authorities start doing active measurements. Implements more of proposal 141. o Major bugfixes: - When Tor clients restart after 1-5 days, they discard all their cached descriptors as too old, but they still use the cached consensus document. This approach is good for robustness, but bad for performance: since they don't know any bandwidths, they end up choosing at random rather than weighting their choice by speed. Fixed by the above feature of putting bandwidths in the consensus. Bugfix on 0.2.0.x. - Directory authorities were neglecting to mark relays down in their internal histories if the relays fall off the routerlist without ever being found unreachable. So there were relays in the histories that haven't been seen for eight months, and are listed as being up for eight months. This wreaked havoc on the "median wfu" and "median mtbf" calculations, in turn making Guard and Stable flags very wrong, hurting network performance. Fixes bugs 696 and 969. Bugfix on 0.2.0.6-alpha. o Minor bugfixes: - Serve the DirPortFrontPage page even when we have been approaching our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha. - The control port would close the connection before flushing long replies, such as the network consensus, if a QUIT command was issued before the reply had completed. Now, the control port flushes all pending replies before closing the connection. Also fixed a spurious warning when a QUIT command is issued after a malformed or rejected AUTHENTICATE command, but before the connection was closed. Patch by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016. - When we can't find an intro key for a v2 hidden service descriptor, fall back to the v0 hidden service descriptor and log a bug message. Workaround for bug 1024. o Minor features: - If we're a relay and we change our IP address, be more verbose about the reason that made us change. Should help track down further bugs for relays on dynamic IP addresses.
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