Problem with Loader, Session and url Helper

[eluser]CARP[/eluser]
Hi guys
I've been working with an app, but suddenly today I got these messages:

http://i.imgur.com/ZNrWI.jpg

Code:

A PHP Error was encountered
Severity: 8192
Message: Assigning the return value of new by reference is deprecated
Filename: libraries/Loader.php
Line Number: 414

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\compras\system\application\libraries\Loader.php:414)
Filename: libraries/Session.php
Line Number: 662

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\compras\system\application\libraries\Loader.php:414)
Filename: libraries/Session.php
Line Number: 662

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\compras\system\application\libraries\Loader.php:414)
Filename: libraries/Session.php
Line Number: 662

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\compras\system\application\libraries\Loader.php:414)
Filename: helpers/url_helper.php
Line Number: 541

I'm puzzled about what's going on.
I've erased the sessions from table, checked the main files, the autoload, etc. but can't fix it...

What can I check? Thanks

[eluser]CARP[/eluser]
I remember I installed lastest xampp version some days ago
It contains php 5.3.1 and latest mySQL

Does any1 know which files should I patch or download?

[eluser]CI_avatar[/eluser]
maybe its in xampp configurations.
try to reinstall again the codeigniter under xampp if it works.

Please post again if it doesnt work.

[eluser]CARP[/eluser]
It seems Backend Pro doesn't work yet with PHP 5...
http://ellislab.com/forums/viewreply/766079/