#693220, 714492: Implement a simple check to verify if WXR file is parsed completely by XMLReader, otherwise assume XML errors. Produce helpful error message and document possible causes/solutions in README

#619516 by lavamind, #689916 by guaka: add support for wp:is_sticky flag and import password-protected posts as unpublished nodes

#645460 by kmonty: Use node taxonomy parameter to avoid calling second node_save, and other small optimizations

#625530 by lavamind: Check for ugly-style permalinks and create a compatible path alias to be referred to by the .htaccess patch

Uncollapse advanced options fieldset if categories, comments or trackbacks modules are missing, or if there's an error in the images directory field.

Remove comment, trackback, path and taxonomy dependencies. These are recommended for full functionality, but not required. Also specify PHP 5.0 requirement.

#612322 by majnoona: Check for duplicates when importing posts (timestamp & title), comments and trackbacks (timestamp & content).

#616454 by lavamind: Implement WXR processing using XMLReader instead of string functions. Other improvements to categories and tags processing and more code comments. Create vocabularies only as needed.

#lavamind: Make default status unpublished unless post is marked 'publish', since there are other WP unpublished statuses such as 'pending', 'review', etc.

#615974 by lavamind: Remove instances of call-time pass-by-reference, generates warnings and isnt needed.