Tagging support breaks post/page posting without tags

[Xmion]

Warning: array_unique() [function.array-unique]: The argument should be an array in \wp-includes\post.php on line 792

Warning: array_diff() [function.array-diff]: Argument #2 is not an array in \wp-includes\post.php on line 807

Warning: array_diff() [function.array-diff]: Argument #1 is not an array in \wp-includes\post.php on line 820

Warning: array_merge() [function.array-merge]: Argument #1 is not an array in \wp-includes\post.php on line 832

Warning: array_unique() [function.array-unique]: The argument should be an array in \wp-includes\post.php on line 832

Warning: Invalid argument supplied for foreach() in \wp-includes\post.php on line 833

Warning: Cannot modify header information - headers already sent by (output started at \wp-includes\post.php:792) in \wp-includes\pluggable.php on line 327

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Another good feature should be to make tagging support for pages, could be good thing if people wanna use tags for SEO plugins etc. I myself should love to transform tags into Meta Keywords.

[johnbillion]

Confirming bug at r5111.

[foolswisdom]

Although critical, the symptom is cosmetic in my experience so far.

[matt]

(In [5113]) If we don't have IDs at this point, bail out. There are no tag defaults. Should fix #4035 though I can't recreate their particular error.