If you're using a bug tracking program like Swatter or BugSack, you can configure them to record taint errors. Otherwise, the command '/console taintLog 1' will enable taint logging in WoW. When you log out or reload your console, WoW will write a file in the "logs" subdirectory of your WoW install path with the name "taint.log" or "taintlog.txt" (I can't remember which)
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