Why not utf-8? And if utf-8 works for you have you tried importing with the utf-8 filter option turned on?

I know, UTF-8 is my best option now. But still having this problem. Its weird, becasue source of forum is in UTF-8. But when i try to import old forum, everything goes wrong. 

So if the source is utf-8 and you have the option turned on within the import to use utf-8 have you looked at the actual database tables to see what encoding they have been created with as the SP tables will inherit the encoding from the database global setting.

Well i tried and no change. I also tried to manualy import original DB into SP, but not working too. I know i doing something wrong, but i realy dont know what

… and the encoding on the database tables themselves?

both, new and old are set on UTF-8_czech_ci. Also tried to set them on CP-1250, no change.

That will be the table collation. Is the table encoding utf-8 as well?

If it is then I am not really sure what to suggest. I do have a script somewhere that attempts to re-code all the posts to utf-8 which I suppose you could try… if I can find it again!

Its simple, i think bbpress screw up coding. Maybe its reforum, i realy dont know. Iam pretty newbie in DB, so i dont know how far can template affect coding. But i thank you, A LOT! If you find that script, it would be great, but for now, i start with manual repairing of DB. Just 4000 post, no more then two weeks of work  Thanks again!

The attached script might help. Please note that the table prefix on this script is the default ‘wp_’ and if different you will need to change it on ALL statements.

It will convert the post content and the topic names. At least that is what it is designed to do and has worked for me in the past.

USE WITH CARE – preferably on a test run of the imported data. You will need a tool like phpMyAdmin to run the script of course. By the way – at the top are articles in the WP Codex on which the script is based.

Your script worked perfectly. But problem persist. Luckily, i found a quick solution. Via SQL Update i replace bad post_content from SF with original post_content from bbpress. So, for now, problem is solved. Once again, i thanku very much for your time and your help!

Sounds painful but glad it got sorted out…