Description:
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Usually, I install software into the folder "systemdisk/Program Files/software".
So I install PHP (including 4.3.4, 4.3.9, 5.0.1) into "L:\Program Files\PHP434\" and set session save path (in the installation wizard) as "L:\Program Files\PHP434\sessiondata\".
Thus, I get the following Warning when I start session by calling session_start().
However, if I change the session.save_path to "L:\temp", no warning will be reported and session files can be saved correctly.

Reproduce code:
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<?php
session_start();
?>

Expected result:
----------------
the code above should not generate any error or output, since it's placed before any http output and session support is enabled.

Actual result:
--------------
Warning: session_start(): open(L:\Program Files\PHP434\sessiondata\sess_bb1a6ba6b2111a38d6c2d88f65a5ff83, O_RDWR) failed: No such file or directory (2) in E:\Web\XinghaiConcertHall\Build\admin\verify.php on line 2

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at E:\Web\XinghaiConcertHall\Build\admin\verify.php:2) in E:\Web\XinghaiConcertHall\Build\admin\verify.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at E:\Web\XinghaiConcertHall\Build\admin\verify.php:2) in E:\Web\XinghaiConcertHall\Build\admin\verify.php on line 2