Kdenlive 0.9.2 on FC17, x86_64, all current patches.
When I click the Render button (or select Render from the pull down), no render dialog appears at all. Kdenlive crashes without any messages. Dumps core. Some files in /var/spool/abrt/ccpp-2012* but inspecting them, I do not see anything that leads where to look.
Help please?
JimR

Here are the results. The eyecatcher comment was mine. Everything up to that was BEFORE I clicked the Render button. Is the LADSPA meaningful here?
$ kdenlive
No LADSPA plugins were found!
Check your LADSPA_PATH environment variable.
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action
kdenlive(4019) KSambaSharePrivate::testparmParamValue: We got some errors while running testparm "Load smb config files from /etc/samba/smb.conf
WARNING: No path in service test - making it unavailable!
Loaded services file OK.
"
kdenlive(4019) Render::checkMaxThreads: // TRACTOR PROBLEM
[swscaler @ 0x7fe584535d80] Warning: data is not aligned! This can lead to a speedloss
logger insert an eyecatcher
Segmentation fault (core dumped)