abrt version: 2.0.1
executable: /usr/libexec/at-spi-bus-launcher
component: at-spi2-core
build_ids: 6ffe5717bdc04650a6023fe5933cd729feab53ee
kernel: 2.6.38.2-9.fc15.x86_64
reason: Process /usr/libexec/at-spi-bus-launcher was killed by signal 11 (SIGSEGV)
dsos: Couldn't get the dsos list: %s [Errno 2] No such file or directory: 'maps'
architecture: x86_64
uid: 42
username: gdm
package: at-spi2-core-2.0.0-1.fc15
os_release: Fedora release 15 (Lovelock)
time: 1303363886
rating: 0

Binary file: coredump, 61440 bytes
Text file: backtrace, 2077 bytes

comment
-----
It happend on startup of gnome, when I turned on my computer.
I think, it was on the gdm-greater, as I couldn't see any user to select.
Problem was gone after an 'init 5 && init 3'.

event_log
-----
2011-04-21-07:36:34> (exited with 0)
2011-04-21-07:36:34> Analyzing coredump '/var/spool/abrt/ccpp-2011-04-21-07:31:26-1334/coredump'
2011-04-21-07:36:35  Coredump references 1 debuginfo files, 1 of them are not installed
2011-04-21-07:36:35  Looking for needed packages in repositories
2011-04-21-07:36:41  Could not parse metalink https://mirrors.fedoraproject.org/metalink?repo=updates-released-debug-f15&arch=x86_64 error was 
2011-04-21-07:36:41  No repomd file
2011-04-21-07:36:50  Packages to download: 1
2011-04-21-07:36:50  Downloading 0.27Mb, installed size: 1.27Mb
2011-04-21-07:36:50  Downloading (1 of 1) at-spi2-core-debuginfo-2.0.0-1.fc15.x86_64.rpm: 100%
2011-04-21-07:36:50  Extracting cpio from /tmp/abrt-tmp-debuginfo-2011-04-21-07:36:35.2114/at-spi2-core-debuginfo-2.0.0-1.fc15.x86_64.rpm
2011-04-21-07:36:51  Caching files from unpacked.cpio made from at-spi2-core-debuginfo-2.0.0-1.fc15.x86_64.rpm
2011-04-21-07:36:51  All downloaded packages have been extracted, removing /tmp/abrt-tmp-debuginfo-2011-04-21-07:36:35.2114
2011-04-21-07:36:51> Backtrace is generated and saved, 2077 bytes
2011-04-21-07:36:51> (exited with 0)