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Thread 0 - System ID 1228
Entry point   php!mainCRTStartup 
Create time   04/02/2009 7:30:26 PM 
Time spent in user mode   0 Days 0:0:0.40 
Time spent in kernel mode   0 Days 0:0:0.150 






Function     Arg 1     Arg 2     Arg 3   Source 
php_rar!Unpack::CorrHuff+47     021c3d9c     021c599c     00c0fa7c    
php_rar!Unpack::InitHuff+9a     021b41f8     020f9b21     00000000    
php_rar!Unpack::Init+46     00000000     00000000     020f80aa    
php_rar!CmdExtract::CmdExtract+41     00c0fb20     017fda80     00000000    
php_rar!RAROpenArchiveEx+5a     00c0fa7c     1000c100     017fd980    
php_rar!RAROpenArchive+41     017fda80     00c0fbd0     017fc278    
php_rar!zif_rar_open+f8     017fc768     017fc780     00000000    
php5ts!zend_do_fcall_common_helper_SPEC+7d9     00c0fbd0     01673e90     017fbfaa    
php5ts!ZEND_DO_FCALL_SPEC_CONST_HANDLER+e5     00000000     01673e90     01673e90    
php5ts!execute+1c5     017fbfb8     01673e90     00000000    
php5ts!zend_execute_scripts+107     00000008     01673e90     00000000    
php5ts!php_execute_script+20d     00c0fec8     01673e90     0012f308    
php!main+c07     00000004     01673da0     01672bf8    
php!mainCRTStartup+e3     0012f308     00000012     7ffdf000    
KERNEL32!DosDateTimeToFileTime+c64     00402fc2     00000000     000000c8    




PHP_RAR!UNPACK::CORRHUFF+47In php__PID__2004__Date__02_04_2009__Time_07_30_56PM__384__Second_Chance_Exception_C0000005.dmp the assembly instruction at php_rar!Unpack::CorrHuff+47 in F:\Program Files\PHP\ext\php_rar.dll from The PHP Group has caused an access violation exception (0xC0000005) when trying to write to memory location 0x0211fffc on thread 0

Module Information 
Image Name: F:\Program Files\PHP\ext\php_rar.dll   Symbol Type:  PDB 
Base address: 0x020f0000   Time Stamp:  Sat May 03 01:05:27 2008  
Checksum: 0x00000000   Comments:   
COM DLL: False   Company Name:  The PHP Group 
ISAPIExtension: False   File Description:  Antony Dovgal 
ISAPIFilter: False   File Version:  5.2.6.6 
Managed DLL: False   Internal Name:  php_rar.dll 
VB DLL: False   Legal Copyright:  Copyright ? 1997-2007 The PHP Group 
Loaded Image Name:  php_rar.dll   Legal Trademarks:  PHP 
Mapped Image Name:  F:\Program Files\PHP\ext\php_rar.dll   Original filename:  php_rar.dll 
Module name:  php_rar   Private Build:   
Single Threaded:  False   Product Name:  PHP php_rar.dll 
Module Size:  172.00 KBytes   Product Version:  5.2.6 
Symbol File Name:  F:\Program Files\PHP\dbg\php_rar.pdb   Special Build:  &

The backtrace shows that the problem lies within the bundled unrar library. 
Which version is used in your extension? See phpinfo() for this information.
Current CVS version includes 3.7.8; if you have an older one, you might want to wait for PECL Win32 builds to reappear and try with newer version of the extension.