Here's the last part of the debug log before it segfaults.
mutt_index_menu[633]: Got op 99
> a0007 NAMESPACE
< * NAMESPACE (("" "/")("#mhinbox" NIL)("#mh/" "/")) (("~" "/")) (("#shared/"
"/")("#ftp/" "/")("#news." ".")("#public/" "/"))
browse_get_namespace: adding #mhinbox
browse_get_namespace: adding #mh/
browse_get_namespace: adding ~
browse_get_namespace: adding #shared/
browse_get_namespace: adding #ftp/
browse_get_namespace: adding #news.
browse_get_namespace: adding #public/
< a0007 OK NAMESPACE completed
> a0008 LIST "" "#mhinbox%"
< a0008 OK LIST completed
> a0009 LIST "" "#mh/%"
< * NO /home/mikes/.mh_profile not found, mh format names disabled
Handling untagged NO
/home/mikes/.mh_profile not found, mh format names disabled
smime.p7s
Description: S/MIME cryptographic signature
