When sep was /, the new Maildir support code would recursively try to
scan ., resulting in huge paths and an eventual crash. Fixed with a
one-line patch to Maildir.py. Closes: [complete.org #60] Sergei, The
below diff is going into 3.99.16. You can apply it to 3.99.15 and it
should work for you now. Please let me know. (Ignore any patch errors
for debian/changelog). Thanks for the report.