We need to see the crash report:
Go to your Applications Folder and open your Utilities Folder. Open the application Console.
In the left-hand column, click on Crash Reporter.
Click on the small triangle under Crash Reporter in the l/h column and they will all be listed.
Scroll down to the latest Safari report and click on it.
Now click on the r/h column (which now only shows THAT crash report and then Command-a to copy it all.
Come back here and Command-v it to post it here!