This is not a bug in MobileSubstrate; this is, in fact, a bug in the
jailbreak tool that was used, and was fixed in later versions of
redsn0w and PwnageTool (and has certainly been fixed for the new
jailbreakme.com). I realize that it seems simple to blame
MobileSubstrate when it tends to show up in every stack trace and
every message log for every single thing that happens on jailbroken
devices (as it is kind of the point of jailbreaking), but there has
only ever been a single program that has ever conflicted with
MobileSubstrate itself, and that's Skype (which is using a DRM that
isn't even App Store legal and seems to be damaging dyld somehow). -J