qbittorrent: broken pipe

[Thomas Klausner <wiz%netbsd.org@localhost>]

qbittorrent dies a lot with 'broken pipe' errors on my system, and I
don't understand why. So I ran ktrace on it and get:

  2199  13372 qbittorrent CALL  __clock_gettime50(0,0x7389dfbb96d0)
  2199  13372 qbittorrent RET   __clock_gettime50 0
  2199  13372 qbittorrent CALL  __clock_gettime50(0,0x7389dfbb9410)
  2199  13372 qbittorrent RET   __clock_gettime50 0
  2199  13372 qbittorrent CALL  sendto(0x18,0x7389d935470f,0x1d,0,0x7389dfbb9500,0x10)
  2199  13372 qbittorrent MISC  msghdr: [name=0x7389dfbb9500, namelen=16, iov=0xffffb2a55a720f50, iovlen=1, control=0x0, controllen=0, flags=0]
  2199  13372 qbittorrent MISC  mbsoname: [XX.XX.XX.XX:XXXXX]
  2199  13372 qbittorrent GIO   fd 24 wrote 29 bytes
  2199  13372 qbittorrent RET   sendto 29/0x1d
  2199  13372 qbittorrent CALL  __clock_gettime50(0,0x7389dfbb96d0)
  2199  13372 qbittorrent RET   __clock_gettime50 0
  2199  13372 qbittorrent CALL  sendmsg(0xfd,0x7389dfbb8f30,0)
  2199  13372 qbittorrent MISC  msghdr: [name=0x0, namelen=0, iov=0x7389dfbb8fa0, iovlen=1, control=0x0, controllen=0, flags=4000000]
  2199  13372 qbittorrent GIO   fd 253 wrote 9 bytes
  2199  13372 qbittorrent RET   sendmsg 9
  2199  13372 qbittorrent CALL  __clock_gettime50(0,0x7389dfbb96d0)
  2199  13372 qbittorrent RET   __clock_gettime50 0
  2199  13372 qbittorrent CALL  sendmsg(0x86,0x7389dfbb8f30,0)
  2199  13372 qbittorrent MISC  msghdr: [name=0x0, namelen=0, iov=0x7389dfbb8fa0, iovlen=1, control=0x0, controllen=0, flags=4000000]
  2199  13372 qbittorrent RET   sendmsg -1 errno 32 Broken pipe
  2199  13372 qbittorrent CALL  __clock_gettime50(0,0x7389dfbb96d0)
  2199  13372 qbittorrent RET   __clock_gettime50 0
  2199  13372 qbittorrent CALL  sendmsg(0x73,0x7389dfbb8f30,0)
  2199  10328 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  13372 qbittorrent MISC  msghdr: [name=0x0, namelen=0, iov=0x7389dfbb8fa0, iovlen=1, control=0x0, controllen=0, flags=4000000]
  2199  10328 qbittorrent PSIG  SIGPIPE SIG_DFL: code=SI_NOINFO
  2199   2312 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  13372 qbittorrent GIO   fd 115 wrote 9 bytes
  2199  13372 qbittorrent RET   sendmsg 9
  2199  16272 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  13782 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  15947 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  14818 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  12012 qbittorrent RET   ___lwp_park60 -1 errno 4 Interrupted system call
  2199  20952 qbittorrent RET   poll -1 errno 4 Interrupted system call

and lots more interrupted system calls.

Does anyone have an idea what could be happening here?
 Thomas