[Pound Mailing List] Too many redirects

I've setup pound on my Debian Squeeze server (pound package from the repository 2.5-1) with the following config:
## Minimal sample pound.cfg#### see pound(8) for details
######################################################################## global options:
User		"www-data"Group		"www-data"#RootJail	"/chroot/pound"
## Logging: (goes to syslog by default)##	0	no logging##	1	normal##	2	extended##	3	Apache-style (common log format)LogLevel	0
## check backend every X secs:Alive		30
## use hardware-accelleration card supported by openssl(1):#SSLEngine	"<hw>"
# poundctl control socketControl "/var/run/pound/poundctl.socket"

######################################################################## listen, redirect and ... to:
## redirect all requests on port 8080 ("ListenHTTP") to the local webserver (see "Service" below):ListenHTTP	Address 111.111.111.111 # My external IP	Port	80
	## allow PUT and DELETE also (by default only GET, POST and HEAD)?:	xHTTP		0
	Service		BackEnd			Address	127.0.0.1			Port	80		End	EndEnd

Apache is running on localhost port 80.When I visit my site via mysite.com all goes well. However when visiting my site via www.mysite.com the browser replies with too many redirects.
The website on Apache has a .htaccess file which does the redirect from www.mysite.com to mysite.com
RewriteCond %{HTTPS} !=onRewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]RewriteRule ^ http://%1%{REQUEST_URI} [R=301,L]

If I setup nginx as a reverse proxy I don't get too many redirects when requesting www, but I don't want nginx I like Pound more.What could cause the problem of the loop?
I made a fix with this:
Service	HeadRequire "^Host: www.mysite.com$"	Redirect 301 "http://mysite.com"End	
But I would like to know why the loop occurs and if there is a other solution.