Superblock problems history (since begin of July)

copied from here

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A user in IRC asked: 

• "I'm interested to learn more about why projects are missing and what's causing SBs to take so long to be found if there's a place I can do a bit of reading"

Below is a list of the change log with SB-related fixes + other links, until we get another official dev update on the troubling superblocks since 5 weeks.

• see also here.

3.5.9.8

•  Revised Neural Network business logic rule fix inability to stake current superblock
• Revised Neural Network magnitude calculation to prevent diluted magnitudes
• Cap magnitude to 32766 in NeuralNet to avoid future hash inconsistencies when packing binary superblocks
• Fix binary pack/unpack bug which could cause the contract to get a different hash when unpacked

3.5.9.7

• Neural Network business logic rule fix inability to stake current superblock:
• Add artificial researcher to contract to push the average magnitude above 70. Without this the superblock is rejected by the wallet

3.5.9.6

• Neural Network enhancement to help stake current superblock: use UTC time instead of local time when determining file mirror filename suffix.

3.5.9.5  

• Fixed Neural Network handling of 404 errors (causing incomplete superblocks),
• and bug causing it to skip Rosetta
• see also: "So, what are the possible reasons for the delay/mag zero this time?" here (downvoted on steemit, please upvote)  
  • BOINC projects being offline (maintainance, unexpected probs, ...)
  • The CENTRALIZED component and NOT OPENSOURCED harvest server seems to make trouble (file names not correct, ...)

3.5.9.4

• fix neural network missing folder error (bug in version 3.5.9.3, more info)

3.5.9.3

• Fix neural network inability to stake superblocks
• Require superblocks to be populated with more than half of the  whitelisted projects (see e.g. recent case with a superblock that had only 4% of the whitelisted BOINC projects included)
• Add subfolders to Neural Network

3.5.9.2

• Fix neural network project gather bug related to timezones

3.5.9.1 (July 3)  

• Neural Network improvements:  
  • Don't download stats data that hasn't changed.
  • Use gridcoin.us as a stat mirror to reduce BOINC server loads.
  • Use UTC instead of local time when filtering idle CPIDs.
  • Only include beacons younger than 6 months when calculating magnitudes.
  • see also: Gridcoin superblock, we forgive you

non-SB-related changes:

3.5.9.4

• fix speech bug
• add checkpoint: #950000 (currently we have 967k blocks)

3.5.9.1

• security: prevent untauthorized poll and vote deletions