Update nodejs version
Current nodejs version is v0.6.20. We are already in 0.10 in the wild. Plus using express framework v3 with nodejs v0.6.20 is making formidable useless (I cannot do multipart post - upload file would be super easy instead of storing to blob with SAS).
I actually consider this a bug, as the request is valid and these is no way around this (of a third party is sending data)