The Little Prince's (Anthony J. Biacco's?) qpopper-mysql-0.8.patch patched, compiled (Maildir capability only, no MySQL) without incident against 4.0.4 sources on a Gentoo Linux 2.4.19 box. The resulting popper daemon seems to be running well (in standalone mode) in the same box.
Although I have read the author's disclaimers and understand that this is a beta patch, I am still looking for users' comments as to its stability on a (very light load) production server. Thank you. Caram