Re: How can I upgrade my 2.2 to v2.3 ?
In general, the Tikiwiki project hasn't used patches to update between releases, so a patch not appearing to update to 2.3 wasn't "forgotten" as far as I know, rather not intended. The ones for Tikiwiki 2.* were an exception.
Anyway, the total package for 2.3 is pretty big, but if you are updating with ftp, just set the transfer setting for "overwrite only if source is newer" and most of the files will be skipped. I update a Tiki 3 test installation on almost a daily basis with this method and it just takes a few minutes (and Tiki 3 is quite a bit larger than Tiki 2). There's no need to specify folders or files to exclude — your ftp client should compare file dates and skip the ones that are unchanged.
-- Gary