Arch Linux

When trying to open a link from an email client programm e.g.

With an instance of chromium already open and the user agent spoofed in the chromium.desktop file like:

Exec=chromium %U --incognito --user-agent='Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.94 Safari/537.36'

With xdg-utils1.1.0.git20141009-1:

$ xdg-open http://www.google.com

START /usr/bin/chromium "http://www.google.com" --incognito --user-agent='Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.94 Safari/537.36'
Created new window in existing browser session.

Works!

With xdg-utils 1.1.0.git20150302-1 and also 1.1.0.git20150323-1:

$ xdg-open http://www.google.com

Created new window in existing browser session.

Fails:
It opens the given link in the first tab and opens eight more empty tabs with parts of the user-agent string set in the desktop file.
Seems like the parts of the user agent string are misinterpreted as links to open e.g. 'http://%28windows/'; 'http://nt/'; 'http://x64%29/'; 'http://applewebkit/537.36'; 'http://%28khtml%2C/' ...

Same happens with every application (email client e.g.) when trying to open a link with xdg-utils 1.1.0.git20150302-1 or xdg-utils 1.1.0.git20150323-1 installed.

Downgrading to xdg-utils1.1.0.git20141009-1 solves it.