How do I get this ticket reopened?
http://calibre.kovidgoyal.net/ticket/2780
I have verified the bug happens in Windows XP SP3 also. However, it is not when converting the ebooks that leaves behind an unused calibre-parallel.exe, it's when importing books to the database. I only imported MOBI books, so I can't tell you if the problem occurs when importing other types.
This is just after importing 4 books in MOBI format:
This is after converting the same 4 books to EPUB.
Cheers
Art