You should wait for fixed binaries from zoidbeg.
My fix seem to solve the issue (my build synced from the scratch normally) so I hope zoidbeg will accept it very soon.
Or you can get somewhere blockchain.bin past 750k block your current daemon will work because it will sync past the critical point
I solved also the sync problem with first use a demon what no have the "check the security bug" and past block 780000. Then use a newer demon what check the security bug.