diff --git a/chain/gen/genesis/miners.go b/chain/gen/genesis/miners.go
index 0fb2f5741..d8cc1484c 100644
--- a/chain/gen/genesis/miners.go
+++ b/chain/gen/genesis/miners.go
@@ -143,7 +143,7 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
 				return cid.Undef, err
 			}
 			params := &power.EnrollCronEventParams{
-				EventEpoch: miner.ProvingPeriod,
+				EventEpoch: miner.ProvingPeriod + power.WindowedPostChallengeDuration,
 				Payload:    payload,
 			}
 
@@ -208,9 +208,11 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
 						DealIDs:         []abi.DealID{dealIDs[pi]},
 						Expiration:      preseal.Deal.EndEpoch,
 					},
-					ActivationEpoch:   0,
-					DealWeight:        dealWeight,
-					PledgeRequirement: pledge,
+					ActivationEpoch:       0,
+					DealWeight:            dealWeight,
+					PledgeRequirement:     pledge,
+					DeclaredFaultEpoch:    -1,
+					DeclaredFaultDuration: -1,
 				}
 
 				err = vm.MutateState(ctx, maddr, func(cst cbor.IpldStore, st *miner.State) error {
diff --git a/chain/stmgr/stmgr.go b/chain/stmgr/stmgr.go
index d147bc791..dff0d9fe3 100644
--- a/chain/stmgr/stmgr.go
+++ b/chain/stmgr/stmgr.go
@@ -289,7 +289,6 @@ func (sm *StateManager) ApplyBlocks(ctx context.Context, pstate cid.Cid, bms []B
 	}
 
 	return st, rectroot, nil
-
 }
 
 func (sm *StateManager) computeTipSetState(ctx context.Context, blks []*types.BlockHeader, cb ExecCallback) (cid.Cid, cid.Cid, error) {
diff --git a/cmd/lotus-storage-miner/init.go b/cmd/lotus-storage-miner/init.go
index a8034ebfd..bf552cd68 100644
--- a/cmd/lotus-storage-miner/init.go
+++ b/cmd/lotus-storage-miner/init.go
@@ -173,7 +173,7 @@ var initCmd = &cli.Command{
 			var localPaths []config.LocalPath
 
 			if pssb := cctx.StringSlice("pre-sealed-sectors"); len(pssb) != 0 {
-				log.Infof("Setting up storage config with presealed sector", pssb)
+				log.Infof("Setting up storage config with presealed sector: %v", pssb)
 
 				for _, psp := range pssb {
 					psp, err := homedir.Expand(psp)
diff --git a/storage/fpost_run.go b/storage/fpost_run.go
index 5f79e62b0..dc38d7f4b 100644
--- a/storage/fpost_run.go
+++ b/storage/fpost_run.go
@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"bytes"
 	"context"
 	"time"
 
@@ -147,7 +148,11 @@ func (s *FPoStScheduler) runPost(ctx context.Context, eps abi.ChainEpoch, ts *ty
 
 	challengeRound := eps
 
-	rand, err := s.api.ChainGetRandomness(ctx, ts.Key(), crypto.DomainSeparationTag_WindowedPoStChallengeSeed, challengeRound, s.actor.Bytes())
+	buf := new(bytes.Buffer)
+	if err := s.actor.MarshalCBOR(buf); err != nil {
+		return nil, xerrors.Errorf("failed to marshal address to cbor: %w", err)
+	}
+	rand, err := s.api.ChainGetRandomness(ctx, ts.Key(), crypto.DomainSeparationTag_WindowedPoStChallengeSeed, challengeRound, buf.Bytes())
 	if err != nil {
 		return nil, xerrors.Errorf("failed to get chain randomness for fpost (ts=%d; eps=%d): %w", ts.Height(), eps, err)
 	}
@@ -187,6 +192,15 @@ func (s *FPoStScheduler) runPost(ctx context.Context, eps abi.ChainEpoch, ts *ty
 		return nil, xerrors.Errorf("running post failed: %w", err)
 	}
 
+	if len(scandidates) == 0 {
+		return nil, xerrors.Errorf("received zero candidates back from generate fallback post")
+	}
+
+	// TODO: until we figure out how fallback post is really supposed to work,
+	// let's just pass a single candidate...
+	scandidates = scandidates[:1]
+	proof = proof[:1]
+
 	elapsed := time.Since(tsStart)
 	log.Infow("submitting PoSt", "pLen", len(proof), "elapsed", elapsed)