dashboard / my sites doesn't handle empty database prefixes properly

[Denis-de-Bernardy]

Original description:

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super admin on newly created MS site can't browse dashboard / my sites

It dies with no link: "You must be a member of at least one site to use this page."

[Denis-de-Bernardy]

the second patch fixes an additional php warning when the blog prefix is an empty string.

[Denis-de-Bernardy]

the third patch additionally fixes a potential security issue in the event a user manages to create arbitrary meta details.

[automattor]

(In [13562]) allow empty table prefix on my-sites.php, see #12459

[Denis-de-Bernardy]

r13562 does NOT work. the first check eliminates the root site, because the capabilities meta is called capabilities.

also, you apparently missed the correction to the regex in the 3rd diff.

[ryan]

(In [13563]) allow empty table prefix on my-sites.php, see #12459

[wpmuguru]

I've been running my test install on no prefix since I did that patch and have not encountered any issues.

[jk3us]

Support for empty database prefixes is broken by WP 3.3, See ​this ticket for more information.