v1.0.2 has some key bugfixes that optionally restore some behaviour from pre-1.0 releases, and fix some other annoying bugs:

• Backwards-compatibilize relative permalinks (#1081)
• Add jekyll doctor command to check site for any known compatibility problems (#1081)
• Deprecate old config server_port, match to port if port isn’t set (#1084)
• Update pygments.rb and kramdon versions to 0.5.0 and 1.0.2, respectively (#1061, #1067)
• Fix issue when post categories are numbers (#1078)
• Add a data-lang="<lang>" attribute to Redcarpet code blocks (#1066)
• Catching that Redcarpet gem isn’t installed (#1059)

See the History page for more information on this release.