Created attachment 312194 [details]
This is the screenshot in gnome-terminal. It looks exactly the same in Konsole.

This the strace output, there was a lot going on on my screen, but in the end
there was just this few lines left.

[thomas@dementia ~]$ rtorrent
) = 16
      ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
write(1, "Caught Segmentation fault, dumpi"..., 42Caught Segmentation fault,
dumping stack:
) = 42
futex(0xab1a74, FUTEX_WAKE_PRIVATE, 2147483647) = 0
write(1, "0 rtorrent [0x80637ac]\n", 230 rtorrent [0x80637ac]
) = 23
write(1, "1 rtorrent [0x806617c]\n", 231 rtorrent [0x806617c]
) = 23
write(1, "2 [0x110400]\n", 132 [0x110400]
)          = 13
write(1, "3 /usr/lib/libcurl.so.4(Curl_do+"..., 503
/usr/lib/libcurl.so.4(Curl_do+0xed) [0x399d20d]
) = 50
write(1, "4 /usr/lib/libcurl.so.4 [0x39acf"..., 364 /usr/lib/libcurl.so.4
[0x39acf5d]
) = 36
write(1, "5 /usr/lib/libcurl.so.4(curl_mul"..., 615
/usr/lib/libcurl.so.4(curl_multi_perform+0x59) [0x39ad2a9]
) = 61
write(1, "6 rtorrent [0x8088293]\n", 236 rtorrent [0x8088293]
) = 23
write(1, "7 rtorrent [0x808337a]\n", 237 rtorrent [0x808337a]
) = 23
write(1, "8 rtorrent [0x80642b8]\n", 238 rtorrent [0x80642b8]
) = 23
write(1, "9 /lib/libc.so.6(__libc_start_ma"..., 529
/lib/libc.so.6(__libc_start_main+0xe6) [0x9605d6]
) = 52
write(1, "10 rtorrent(_ZNSt8ios_base4InitD"..., 5410
rtorrent(_ZNSt8ios_base4InitD1Ev+0x51) [0x8052001]
) = 54
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(27330, 27330, SIGABRT)           = 0
--- SIGABRT (Aborted) @ 0 (0) ---
+++ killed by SIGABRT +++
[thomas@dementia ~]$

I hope it is helpful. If you need more or the output of other commands let me know.

Created attachment 312201 [details]
Ok, this is a better strace from gnome-terminal.

what version of libcurl are you using ? 

I'm having the same crash. I noticed that downgrading curl to 7.17.1 the crash
doesn't happen. Not sure about this. I may be just a coincidence. Can you try this? 

Well.. Interesting is, i tested rtorrent on another Box
(libcurl-7.18.2-1.fc9.i386) and without my old rtorrent.rc with just 1 File
(community-respin) and it runs for hours now.
It seems it is related to the old rtorrent.rc (i`ve done copy/paste from F8 to
F9) or if there are to many torrents the same time (about 40-50).

I cant test it again on the Box that fails, because there is no more Fedora on
it. There was to much trouble on this Laptop with Fedora, so i changed to
another Linux Distro.
But rtorrent runs on the Desktopsystem with F9, no rtorrent.rc and just 1 torrent.

What does it look like if you get a full backtrace?
https://fedoraproject.org/wiki/StackTraces

Ah, I'm running rtorrent with about 50 torrents for 2 days now with no problem.
Latest rawhide. I guess this can be closed since no one  can reproduce it and
provide a backtrace.

Still no problem with fedora 10: 
libtorrent-0.12.4-1.fc10.x86_64
rtorrent-0.8.4-1.fc10.x86_64

I'm closing this. No need to be open since no one has complained for 4 months.

I'm getting this issue on fully-updated Fedora 10. rtorrent will run for between 30 minutes and a few hours before crashing with SIGABRT. Here's the backtrace made by following the directions in the aforementioned link:

Thread 1 (Thread 0xb7fe8740 (LWP 3377)):
#0  0x003d8416 in __kernel_vsyscall ()
#1  0x005f4460 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0x005f5e28 in abort () at abort.c:88
#3  0x00631fed in __libc_message (do_abort=2, fmt=0x70ce68 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:170
#4  0x006383a4 in malloc_printerr (action=2, str=0x70cf60 "double free or corruption (!prev)", ptr=0xa530788) at malloc.c:5994
#5  0x0063a356 in __libc_free (mem=0xa530788) at malloc.c:3625
#6  0x04765b37 in PR_Free () from /lib/libnspr4.so
#7  0x00e382f8 in ?? () from /lib/libnsspem.so
#8  0x00e2679b in ?? () from /lib/libnsspem.so
#9  0x00e283ce in ?? () from /lib/libnsspem.so
#10 0x00e2c7f4 in ?? () from /lib/libnsspem.so
#11 0x00e342c9 in ?? () from /lib/libnsspem.so
#12 0x00e234ac in ?? () from /lib/libnsspem.so
#13 0x047d2ece in ?? () from /lib/libnss3.so
#14 0x047d3150 in PK11_CreateGenericObject () from /lib/libnss3.so
#15 0x06084949 in nss_load_cert () from /usr/lib/libcurl.so.4
#16 0x0608544c in Curl_nss_connect () from /usr/lib/libcurl.so.4
#17 0x0607c2f5 in Curl_ssl_connect_nonblocking () from /usr/lib/libcurl.so.4
#18 0x06057291 in https_connecting () from /usr/lib/libcurl.so.4
#19 0x060629c1 in Curl_protocol_connect () from /usr/lib/libcurl.so.4
#20 0x06076cb7 in multi_runsingle () from /usr/lib/libcurl.so.4
#21 0x060771ba in multi_socket () from /usr/lib/libcurl.so.4
#22 0x06077285 in curl_multi_socket_action () from /usr/lib/libcurl.so.4
#23 0x0808f5f8 in core::CurlStack::receive_action (this=0x81163a8, socket=0x87f8208, events=3377) at curl_stack.cc:93
#24 0x08091206 in core::CurlSocket::event_write (this=0x87f8208) at curl_socket.cc:118
#25 0x0054977c in torrent::PollEPoll::perform (this=0x811cdc8) at poll_epoll.cc:168
#26 0x0808be8b in core::PollManagerEPoll::poll (this=0x811cc18, timeout={m_time = 938917}) at poll_manager_epoll.cc:74
#27 0x0806b6aa in main (argc=1, argv=0xbffff234) at main.cc:318

To Shawn Baker:

This ticket is a closed one. Please open a new one. Your backtrace would be more detailed if you installed "nss-debuginfo" and "curl-debuginfo" e.g. by running "debuginfo-install -y nss curl", because the backtrace is deep into NSS.