Although https://hudson.dev.java.net/issues/show_bug.cgi?id=909 fixes the issue
of URL encoding for the group messages, it appears that the per-developer
'You're suspected of having broken ...' or 'Seems you've fixed' messages have
not been fixed - neither one is performing a 'Util.encode(lastBuild.getUrl())'
on the build URL.

example in jabber client:

bad: (11:29:28 AM) Hudson: You're suspected of having broken Opsera Common - CI:
http://alm-test.opsera.com:8070/job/Opsera Common - CI/82/

good: (12:01:20 PM) hudson@alm-test.opsera.com: Project Opsera Common - CI build
(84): SUCCESS in 5 min 3 sec and counting:
http://alm-test.opsera.com/hudson/job/Opsera%20Common%20-%20CI/84/

Fix is trivial, simply perform proper encoding on URLs before sending them to
clients