Version:           Rosegarden4 - RosegardenSequencer (using KDE 4.2.4)
OS:                Linux
Installed from:    Fedora RPMs

When starting Rosegarden4 in Fedora 11, first I got the error message from Jack "could not open ALSA sequencer"; then Rosegarden4 crashes with the following bug report :
Application: RosegardenSequencer (rosegardensequencer), signal SIGABRT
[Current thread is 1 (Thread 0xb801e780 (LWP 5285))]

Thread 2 (Thread 0xb7dd5b70 (LWP 5287)):
#0  0x00c81422 in __kernel_vsyscall ()
#1  0x009adfa5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x0514f5df in ?? () from /usr/lib/libjack.so.0
#3  0x009a9935 in start_thread () from /lib/libpthread.so.0
#4  0x005f982e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb801e780 (LWP 5285)):
[KCrash Handler]
#6  0x00c81422 in __kernel_vsyscall ()
#7  0x005467c1 in raise () from /lib/libc.so.6
#8  0x00548092 in abort () from /lib/libc.so.6
#9  0x0053f8ee in __assert_fail () from /lib/libc.so.6
#10 0x05c687fc in snd_seq_get_queue_status () from /lib/libasound.so.2
#11 0x08086bfb in Rosegarden::AlsaDriver::getAlsaTime() ()
#12 0x08086e29 in Rosegarden::AlsaDriver::shutdown() ()
#13 0x080a7de8 in Rosegarden::SoundDriverFactory::createDriver(Rosegarden::MappedStudio*) ()
#14 0x080b0576 in Rosegarden::RosegardenSequencerApp::RosegardenSequencerApp() ()
#15 0x080a94b6 in main ()