Please compare hashes (e.g. in debug menu: getblockhash 1001890):
When your hash doesn't match, try a restart of the client (see here why). If that did not help: you might try from menu: Advanced » Rebuild Block Chain (you can also apply the snapshot/bootstrap and make also a !backup of your important files); OR: come to IRC and we'll help you
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1001890 - 27e7f8b5fa28706c2fd35ce8b0b11f4e1e9aad7957f0370cf665189f33cf33f9 (156.3 mio net weight)
1001713 - ff64c5344351641b6db53f6b5b2f17e3e3522869761b59432554868b779fb93a (142.7 mio net weight)
1001688 - 333df9e9c899c922be7ef85f70866fe511159db2b5f430140bbaab6011515fd0 (137.3 mio net weight)
"I've had several issues with all my three nodes forking recently, and this morning was no exception. ... submitted most of my debug logs to the developers ... It shouldn't be like this, and it hasn't been before."
Please compare hashes (e.g. in debug menu: getblockhash 1001890):
we have a fork (at least gridcoinstats + 1user reports):
most uptodate in IRC!
read in #10 how to check your hash, general info on forks, etc..
see category fork for other fork situations