I am getting the same. Just jailbroke with iPhone 5s and evasion 1.0.4.
Anyone know if its a server side issue?
On iPad Mini Retina, but not iPhone...
How to fix, have deleted and re-added, and refreshed multiple times...
re install cydia substrate and safe mode substrate... fixed it for me
Found that on jailbreakqa. It worked for me
Yes, something is going on with BigBoss Repo. Clean install no other repos other than Cydia's default and immediate Hash Sum mismatch.
1- Remove BigBoss from the Sources (Manage -> Sources)
2- Go to Changes tab and press Refresh in the top left corner.
3- Re-add BigBoss (Cydia tab -> More Package Sources -> BigBoss)
This worked for me.
Created an account just to let you know this worked for me also! It was driving me crazy and I couldn't get BigBoss to update at all. Refreshing the changes page before re-adding the BigBoss repo did the trick! Thanks!