The following problems occur when an article is submitted:
The file gets uploaded ok. In the final step of submission ("save ..."), however, I get errors of the type "duplicate entry ... for key 2".
I was able to determine that this has to do with the index article_file_article_id on the table "article_files": when I remove the index, the error goes away.
Before removing the index, I had tried to manually change the article file's article_id to a different number (say, 20). Then the submission could also be completed without the error message.
A further problem, or weird thing: All submissions show up twice in the submissions list after they were submitted. However, I just closed the Browser window and opened the site again, and the number of submissions was correct.
This is OJS 2.1, revision 0, build 1.
MySQL 4.1.10a, with all charsets set to utf8, php 5.0.5.