I just lost 430 rep. from 6777 earlier today to 6347.
This seems to be localized to my account only.
This means the vote anomaly detector saw a statistical anomaly in votes cast to your account (up or down) and invalidated them.
This is weird indeed:
You already stated that you are not aware of any deleted posts of yours, which is the primary reason for such reputation losses.
We already covered the conversion of the
dev-tip posts into Community Wiki posts in Matts answer:
I just reassured that me working through your nice QuickStart documentation series of Soapi.JS2 and voting on each of the posts respectively for +8 there (plus maybe another vote on that day) has not been considered vote fraud, which is another major reason for such reputation losses (see What are the mechanics of vote fraud handling?):
I still wouldn't be too surprised to find some other earlier votes of mine reverted, as I've been tracking your activities pretty closely and, given your impressive pace, may have exhibited 'suspicious' voting patterns, for example by voting too fast on several posts (I regularly trigger the posting captcha and other UI throttles ;)
So this might only be resolvable by moderator analysis, though Diagos answer again seems to indicate that this might not even be (easily) possible; at least I've seen such analysis before, maybe there are some inside paths available to someone in charge still.
Looks like one should regularly persist the reputation audit at least to allow for diffing and eventually encircling such cases later on ;)
I'll be willing to bet money that it was because of all those non cw dev-tip posts being converted to cw