skip-symbolic-links skip-external-locking (draft)

Enable or disable symbolic link support. This option has different effects on Windows and Unix.
On Windows, enabling symbolic links allows you to establish a symbolic link to a database directory by creating a directory.sym file that contains the path to the real directory. See Section 7.6.1.3, “Using Symbolic Links for Databases on Windows” (from the MySQL documentation).

I'm currently running with:
skip-symbolic-links

Reference:
http://dev.mysql.com/doc/refman/5.0/en/windows-symbolic-links.html

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The only case in which you cannot use --skip-external-locking is if you run multiple MySQL servers (not clients) on the same data, or if you run myisamchk to check (not repair) a table without telling the server to flush and lock the tables first. Note that using multiple MySQL servers to access the same data concurrently is generally not recommended, except when using MySQL Cluster.

This option is turned on by default as of MySQL 4.0.

Ref:
http://dev.mysql.com/doc/refman/4.1/en/system.html