Due to dates involved am guessing that http://hg.adium.im/adium/rev/3bb6e4b74b9d makes whatever automated thing that builds nightly versions unhappy. http://nightly.adium.im/
P.S. Don't expect nightly builds should always work of course, just have incorporated checking http://hg.adium.im/adium/ as part of daily sick OCD habit and panicked when I noticed I wasn't going to get the improved date parsing performance patch. Feel free to tell me to fu-#$% off or ignore. =p