Permalinks problem

There’s something drastically wrong with permalinks. Have tried th evarious options to see what works best and now I’ve ended up with a load of junk in my posts table.

– most alt_link_text entries are NULL but many have post_titles

– most post_names entries show previous post names even though they have been changed during site build.

– many post_names are numbers, some are text other have crap like %e9%98%bf%e7%83%8f%e7%89%b9%e6%88%91%e5%80%91-about- the guid’s are a mix of formats – some have page_ids others do not.

– quite a few post have show_in_menu=0 – don’t know why

I disabled revisions and autosave so all the above are valid pages.

I don’t know whats wrong but it looks like there is something well screwy with 2.9.1