Cannot delete Custom Field after adding another Custom Field without page refresh

[markjaquith]

Steps to reproduce:

1. Create a new draft: "test"
2. Save and continue editing
3. Create a new custom field/value pair and click "Add Custom Field »" to trigger an AJAX add
4. Refresh the page (or save and continue editing)
5. Add another custom field/value pair (again, using the AJAX "Add Custom Field »")
6. Now try to delete either of the custom fields. You'll get "Something strange happened. Try refreshing the page" and the items will not be deleted.

Expected result is that deletion always work.

[greftek]

I encounter exactly the same bug using Wordpress version 2.2.2.

Deleting the custom field, then storing the post does not result in the expected removal of the custom field from the database.

[xknown]

I cannot reproduce this bug in trunk (rev. 6542). I think it was fixed in [6213].

Related bug #4474.