Actually, after now using IE7 a bit I notice a "similar" behavior. It doesn't popup a dialog, instead it simply say the page couldn't be accessed and I simply have to refresh one or more times to get to it.

However, sometimes I get strange errors accessing files I know is available. I guess it's xdebug that displays the nice grids with error info ;-) as they have never shown before I installed it. It typically starts with an "...failed to open stream: Resource temporarily unavailable in /var/www/..." error, here's an example, it might not format well but hopefully is readable:

( ! ) Warning: include_once(/var/www/www.astrocalc.com/htdocs/util) [function.include-once]: failed to open stream: Resource temporarily unavailable in /var/www/www.astrocalc.com/htdocs/kernel/kernel_lib.php on line 17
Call Stack

Time Memory Function Location

1 0.0008 71368 {main}( ) ../index.php:0
2 0.0010 74556 require_once( '/var/www/www.astrocalc.com/htdocs/bit_setup_inc.php' ) ../index.php:12
3 0.0027 155632 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/setup_inc.php' ) ../bit_setup_inc.php:8
4 0.0089 347168 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/kernel_lib.php' ) ../setup_inc.php:16
Dump $_SERVER
Dump $_GET
Dump $_POST
Dump $_COOKIE
Dump $_FILES
Dump $_ENV
Dump $_SESSION
Dump $_REQUEST

( ! ) Warning: include_once() [function.include]: Failed opening '/var/www/www.astrocalc.com/htdocs/util' for inclusion (include_path='.:/usr/share/php5:/usr/share/php') in /var/www/www.astrocalc.com/htdocs/kernel/kernel_lib.php on line 17
Call Stack

Time Memory Function Location

1 0.0008 71368 {main}( ) ../index.php:0
2 0.0010 74556 require_once( '/var/www/www.astrocalc.com/htdocs/bit_setup_inc.php' ) ../index.php:12
3 0.0027 155632 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/setup_inc.php' ) ../bit_setup_inc.php:8
4 0.0089 347168 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/kernel_lib.php' ) ../setup_inc.php:16

( ! ) Warning: require_once(/var/www/www.astrocalc.com/htdocs/util) [function.require-once]: failed to open stream: Resource temporarily unavailable in /var/www/www.astrocalc.com/htdocs/kernel/BitDbAdodb.php on line 35
Call Stack

Time Memory Function Location

1 0.0008 71368 {main}( ) ../index.php:0
2 0.0010 74556 require_once( '/var/www/www.astrocalc.com/htdocs/bit_setup_inc.php' ) ../index.php:12
3 0.0027 155632 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/setup_inc.php' ) ../bit_setup_inc.php:8
4 0.0141 487172 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/BitDbAdodb.php' ) ../setup_inc.php:49

( ! ) Fatal error: require_once() [function.require]: Failed opening required '/var/www/www.astrocalc.com/htdocs/util' (include_path='.:/usr/share/php5:/usr/share/php') in /var/www/www.astrocalc.com/htdocs/kernel/BitDbAdodb.php on line 35
Call Stack

Time Memory Function Location

1 0.0008 71368 {main}( ) ../index.php:0
2 0.0010 74556 require_once( '/var/www/www.astrocalc.com/htdocs/bit_setup_inc.php' ) ../index.php:12
3 0.0027 155632 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/setup_inc.php' ) ../bit_setup_inc.php:8
4 0.0141 487172 require_once( '/var/www/www.astrocalc.com/htdocs/kernel/BitDbAdodb.php' ) ../setup_inc.php:49

forgot to say that a refresh of the page makes the error go away and parse the page instead.

Xdebug indeed shows you the nice infos, but the error messages are still coming from PHP itself. As Xdebug runs on the server inside PHP, the browser can definitely not have any influence on this. This is not an Xdebug issue, I think something else is going on for you. Please do upgrade to the latest Xdebug though, which has now been released as 2.0.2.

This is really still going on with 2.0.2 and it only happens if xdebug is installed. If I uninstall xdebug, it stops, if I install it starts again. That makes it pretty clear I think, it has something to do with xdebug. I admit it's strange though if I am the only one experience this?

I will try to make it clearer what is happening. It's the same behavior as if you try to run a php file, not having apache properly configurated - the browser tries to "open" the file instead of parse and execute it. I have also tried to set to not open the browser and just use the inline browser, but it still insist on open an instance of Firefox, which is my default browser.

I have since also upgraded to PHP 5.2.5 and apache 2.2.6, with same result. Also note this is remote debugging, and I debug running Eclipse 3.3.1 with PDT and Aptana plugins installed.

what kind of feedback do you want?

i have the same problem.
everything above happens for me too
i also have gentoo linux with latest software from portage.
also i've tried to compile xdebug from cvs, but it doesn't help.

please contact me on jabber (rion[@]jabbus.org) if you need more info.

I can not reproduce this.