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Patch 1.0.1 was the version of World of Warcraft that was likely the second open Beta client, but this is not confirmed by any reliable sources.

See also

• Beta
• Patch 1.0.0 - first open Beta client
• Patch 1.1.0 - a closed Beta client?
• Patch 1.1.1 - a closed Beta client
• Patch 1.1.2 - probably CD version for US retail box and EU Beta client
• Patch 1.2.3 - probably CD version for EU retail box