Description:
------------
I'm not sure if this is a very major problem, or even a bug, but here goes:

It seems rand() on Windows is very predictable.

I've tried it on 2 Windows Systems, and they were both predictable.  It showed a breif unpredictable segment, then followed by the same string of characters over and over, and finally a few more unpredictable characters.

I tried this on a FreeBSD 5.2 System, and it was unpreditable enough.  Seems to be a windows-only problem.

I also noticed bug#11108 - It seems similar, but the submitter was using his own seeds, and I am using without.

Reproduce code:
---------------
<?php
// This will reproduce the problem
// on windows
for($x = 0; $x < 500; $x++) {
  echo chr((rand()%32)+65);
} 

// This is a quick-fix, but
// goes agaist the documentation's
// 'no need for srand()'
for($x = 0; $x < 500; $x++) {
	srand(hexdec(substr(md5(microtime()), 0, 8)));
	echo chr((rand()%32)+65);
}

?>

Expected result:
----------------
Something a bit random like:

HEOSITFS[ZYH_EVIVVXSLCWRHHC_]_L^PIBTC\TXPBWQLCM^VZSU`UHOG[\VF[KCDGFZM^Q\IG^KAIYPIYBSBIMGHXIBMPHLY\OAZMYAZPJ_`D`F\X\QXR[GP]DQLRHMYIOERBMEKBDJMJPN]J\\KPES^EGRKKO^S[`XL\SSHQXOYQU_JDMM`ZEUEOQOYMHJPYDTRRU_URHYJGXRQYDYADD]OBVUGC^GGSXPRJJAOAKRAYYN^Q\`XFQJNOWQKAJBFONFXNDZFFIMYRL`ROH^]IM_MINJI\MJJAVG`]_B_EAV`C\O_\DHCHLX_NIO`U^KMJF\`K]VZDOZ_FAWCZC_IQK^[NTPZCC]XEFZ[`\AG[PV^XLPRYVAS]ZPH`^WAXYAZYGK_M_QK`F]PRMP^BBPTRV^KV_VDOLFIM]WQNHVF^DYWGGSGLJ_ZMODG[Z_AAXBYD^FS\MITLZESC`DXLH]NWNIVWZZMVMSXFQMG[O[W[YSPVMTQLHD

Actual result:
--------------
An easily spotted pattern:

]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\YRWXENCTQJOP]F[LIBGHU^SDAZ_`MVK\