In the month since the release of 8.1.0 several minor bugs have been fixed, which have been accumulated into the 8.1.1 release. 7.3.12, 7.4.10 and 8.0.5 patch releases are also available.
For a complete list of bugs fixed, please see the appropriate HISTORY file available within each releases tar files. This will be available online as soon as the documentation is rebuilt.
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