As <ahref="http://unethicalblogger.com/posts/tyler/twitterbot_no_really_i_need_to_be_stopped#comment-17">some of you</a> may have noticed, the <ahref="http://trac.geekisp.com/bleep/wiki/Twitterbot">Twitterbot</a> seems to always fail to authenticate properly against <ahref="http://www.twitter.com">twitter's</a> basic HTTP authentication prompt when run from Mono 1.2.3 on Mac OS X. This was neither an error in twitter's webservice (I have been running my bots from a FreeBSD machine with Mono 1.1.13 for some time now) nor in the Twitterbot code itself, but rather a regression in the System.Net.Configuration namespace, I'll let "kangaroo" (the developer who found and fixed the bug) explain:
<br>
<!--break--><br>
<code>13:03 <@kangaroo> ok its falling in to DoPreAuth
<br>
14:05 <@kangaroo> you need a new System.dll</code><br>
<br>
The patch should make it into the next bug-fix release of Mono (1.2.3.2) and should allow you to once again run Twitterbot on Mac OS X, otherwise you might want to try another machine, or step back a few point releases if it's <em>that</em> critical to have you Twitterbot running.