Mac and Windows binaries are signed with certificates owned by the Bitcoin Foundation, to be compatible with the new security features in OSX LevelDB, a fast, open-source, non-relational database from Google, is now used to store transaction and block indices.
Berkeley DB is now only used for the wallet. He also implemented parallel signature checking, so if you have a multi-CPU machine all CPUs will be used to verify transactions. An attacker could send a series of messages that resulted in an integer division-by-zero error in the Bloom Filter handling code, causing the Bitcoin-Qt or bitcoind process to crash. Bloom filters were introduced with version 0. Implement a better fix for the fill-memory-with-orphan-transactions attack that was fixed in 0.
Fix non-standard disconnected transactions causing mempool orphans. So I can assist with the off chance it is recoverable. I can't find any examples of what the random seed data from moving your mouse looked like. Before Bitcoin Core 0. Keys were just generated randomly, each individually, and added to a keypool. In old versions, OpenSSL's random number generator was used.
You need to look at the source code for this, I don't think you can easily derive this from looking at the binary.
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The releases on github do not have binaries. These must be compiled, compiling qt on windows is not trivial even for a developer unfamiliar with it. Can't source inspection be used to "see how the random seed was generated "? This is a major release designed to improve performance and handle the increasing volume of transactions on the network. If you are running an older version, shut it down.
The first time you run after the upgrade a re-indexing process will be started that will take anywhere from 30 minutes to several hours, depending on the speed of your machine.
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