Safari 5.1.9 crashing constantly

Question

I see many have problems with Safari 6.0.4 constantly crashing.
I have same issues with 5.1.9 on Snow Leopard.
The thing is that it worked without problems for a day after installation. However since today it crashes constantly. I cannot even load a page when it crashes and quits (see log below). I have not installed any new sofware today to cause those sudden crashes.
Is anyone else haveing problems with 5.1.9? Any sollutions?
Here's the log:
Process:         Safari [1015]
Path:            /Applications/Safari.app/Contents/MacOS/Safari
Identifier:      com.apple.Safari
Version:         5.1.9 (6534.59.8)
Build Info:      WebBrowser-75345908~1
Code Type:       X86-64 (Native)
Parent Process:  launchd [115]
Date/Time:       2013-04-23 23:29:40.858 +0900
OS Version:      Mac OS X 10.6.8 (10K549)
Report Version:  6
Interval Since Last Report:          426325 sec
Crashes Since Last Report:           19
Per-App Interval Since Last Report:  132780 sec
Per-App Crashes Since Last Report:   16
Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018
Crashed Thread:  2  WebCore: IconDatabase

Answer 1

Back up all data.
Triple-click the line of text below to select it, then copy the selected text to the Clipboard (command-C):
~/Library/Safari/WebpageIcons.db
Quit Safari if it's running. Select
Go ▹ Go to Folder
from the Finder menu bar. Paste into the text box that opens (command-V) and press return. Delete the selected file in the window that opens. Relaunch Safari and test.