First of all, as stated in the sticky title, all delegates should upgrade to release 0.4.27.1.
For increased stability, delegates can download this file into your .BitShares directory before reindexing. It's at raw.githubusercontent.com/BitShares/bitshares/cp1286500/checkpoints.json on Github, (sorry I can't post a proper link because this account's still newb status).
You can also use the checkpoint file after upgrading to 0.4.27.1 if you reindex manually with the --rebuild-index command line option.
The file contains checkpoints every 1000 blocks for the past few days. Since 1000 blocks is shorter than the undo buffer in the most recent release, you should be able to recover automatically from any recent fork before block 1286500.
Topic: Delegates: Please upgrade to 0.4.27.1; use new checkpoints.json if still stuck (Read 1625 times)
