enabling administration menu outputs strange characters [#1326448]

On an almost clean drupal 7 installation when I enable administration menu it outputs some weird characters at the top of the page (see screenshot). Anyone knows what is causing this?

Comment	File	Size	Author
	screenshot.jpg	85.61 KB	atxajon

Comments

Comment #1

sun

German

Karlsruhe

commented 30 October 2011 at 15:45

Which browser and version are you using?

Also, on what web server software is your site hosted? Does it support gzip compression?

Can you provide HTTP request and response header information for a page load that results in an output like this?

Comment #2

atxajon commented 30 October 2011 at 16:03

I am working locally, both firefox chrome and IE show the characters.

Response Headers 
Date	Sun, 30 Oct 2011 15:54:51 GMT
Server	Apache/2.2.11 (Win32) PHP/5.2.9
X-Powered-By	PHP/5.2.9
Expires	Mon, 29 Oct 2012 15:54:51 +0000
Last-Modified	Sun, 30 Oct 2011 15:54:51 +0000
Cache-Control	max-age=1351526091
Etag	"1319990091"
Vary	Accept-Encoding
Content-Encoding	gzip
Content-Length	3506
Connection	close
Content-Type	text/html

Request Headers 
Host	localhost
User-Agent	Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0
Accept	text/plain, */*; q=0.01
Accept-Language	en-gb,en;q=0.5
Accept-Encoding	gzip, deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection	close
X-Requested-With	XMLHttpRequest
Referer	http://localhost/drupal7sandbox/
Cookie	Drupal.toolbar.collapsed=0; has_js=1; SESSab8d97d3f4158f17be286ccf9117b05e=ODEgoZbCJ32wSPhF_ZLMOd84Egltdvd2UU2jSyCzApQ; DrupalAdminToolbar=expanded%3D0; SESS5a480d13812eae04fe2f3fbb68939d2a=VSypFhvvCY4lRmYYLypGYRHiTXZeerxYOw3T_lLd6N8; SESS42d268f645518764594941e6d8a144dd=ZQR3RWQ8k7hBzADFJAhro5BMKrtMExmvdTd3vKv3fkY