The bug is the same for both plugins so i will describe it for bogofilter.

Configuration:
1. Enabled bogofilter plugin (spamassassin plugin disabled)
2. Enabled "Check of incoming messages for spam" in the Preferences->Mail preferences->Junk
3. Default Junk plugin chosen Bogofilter (in the Preferences->Mail preferences->Junk)
4. Enabled check custom headers for Junk (in the Preferences->Mail preferences->Junk)
5. All mail accounts have enabled option for "Check new messages for Junk content".
6. All mail accounts are IMAP. One mail account POP

Expected results:
1. When a new message arrives it should be piped/checked by bogofilter(or Spamassassin) and they should classify it and add their headers for that check (like X-Bogosity, X-Spam-Flag etc)
2. When ready Evolution should move the message in the respective Junk Folder if the message is Junk.

Actual results:
1. No message has ever been checked by bogofilter or SA - nothing in the debug log of Evolution, nor in spamd, no check headers are ever added to the message (X-Bogosity etc)
2. No message is ever classified as Junk and ever moved in Junk folder

Additional info:
1. SA and bogofilter work normally with other email clients and if invoked manually.
2. Distro is Ubuntu Jaunty 9.04
3. SA and bogofilter has been "trained" for a long time. Bogofilter for example has more than 3500 entries for ham/spam