Recommended versions of Tor

[john smith]

Greetings!

I have received the following in my Tor log:

[Warning] Please upgrade! This version of Tor (0.2.0.21-rc) is not
recommended, according to the directory authorities. Recommended
versions are: 0.1.2.19,0.2.0.18-alpha,0.2.0.19-alpha,0.2.0.22-rc

When I check on the Tor download page, the only unstable version
available is 0.2.0.21-rc-0.1.0 & the recommended version 0.2.0.22-rc
does not seem to be available to download.

Regards,

john smith