In the "slf4j-api version does not match that of the binding" entry (http://www.slf4j.org/codes.html#version_mismatch) on the "SLF4J warning or error messages and their meanings" page, there is a typo in the second paragraph. The word 'take' should be 'make'.

So this:
In general, you should take sure that...
should be:
In general, you should make sure that...