Architecture / Installation

I just installed TikiWiki 1.9DR4 locally on my computer. I've used easyphp 1.8 (Apache 1.3.33 PHP 4.3.10 MySql 4.1.9) for Apache, PHP and MySql configuration (OS WIndows XP). (by the way the same problems appear using easyphp 1.7 (Apache 1.3.27 PHP 4.3.3 MySql 4.0.15)

After installation of TW when I login as admin appear these three Warnings and I can't go on.

Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of runtime function name(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in c:\programmi\easyphp1-8\www\tiki9\lib\userslib.php on line 544

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at c:\programmi\easyphp1-8\www\tiki9\lib\userslib.php:544) in c:\programmi\easyphp1-8\www\tiki9\tiki-setup_base.php on line 186

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at c:\programmi\easyphp1-8\www\tiki9\lib\userslib.php:544) in c:\programmi\easyphp1-8\www\tiki9\tiki-setup_base.php on line 186
header already sent

After I've modified php.ini setting allow_call_time_pass_reference to on I can enter in Tiki. Everithing seems ok except showing wiki pages where I can find these new warnings

Warning: mkdir(/tmp/0a): No such file or directory in c:\programmi\easyphp1-8\www\tiki9\lib\adodb\adodb.inc.php on line 1551

Warning: fopen(/tmp/0a/adodb_0a876e927facc3f3436a0af11a57eb38.cache67193300_1110307262422df1bea40d4416): failed to open stream: No such file or directory in c:\programmi\easyphp1-8\www\tiki9\lib\adodb\adodb-csvlib.inc.php on line 282

Are these bugs of Tiki or only problems with my computer default configurations set by easyphp?

Ciao
Mario