I have two versions of WP - 2.1.3 & 2.2
I have editor problems in both:
2.2 I had to turn th visual editor off to get the code editor to work - even then its strips some html tags.
However, in 2.1.3 I've encountered a very odd problem:
I turned off the visual editor, then copy pasted some html which included a table. It loaded fine but also pulled in the WP footer file!
I deleted the entry, tried it again, and it still pulled up the footer file. The footer code did not show in the code editor but appeared on the post above the table.
I then turned the visual editor back on, re-did the post in the code editor, and it appeared perfectly.... weird!