[imp] Troubles with Sort and Search in Imp-4.1.4/Horde3.1.4

[Len Burns]

Good day people,

I had used and earlier version of imp/horde for quite a long time with
little problem, but now under PHP5 I am having several
difficulties.  I am running IMP-4.1.4/Horde3.1.4, php5.24 under
NetBSD, same results on two versions of NetBSD.  All php tests check
out, and pear looks as it ought to.  I can login to IMP normally, and
send/receive mail.  However, if I change the sort from the default
arrival time, all messages disappear and IMP tells me the inbox is
empty.  I then go into options, reset the sort and reload the inbox.
Now once again all is well.  The search function is behaving
similarly, it always returns as empty.  What I am needing is a bit of
wisdom about where to begin tracking this down.  Any and all
suggestions would be much appreciated.  TIA!

-Len