"blocks" : 609,
"difficulty" : 0.00002268,
Is that correct?
blocks" : 609
difficulty" : 0.00000185
This is the correct one.
Thanks. On desktop #1 I'm on the correct fork, but on desktop #2 I'm on the wrong one. Both are using the same operating system (W7 x64) and both have the latest client version ("version" : 85400,). They also have the same nodes in the config file.
How can I get on the right fork on desktop #2?
This problem is also occurring on my linux VPS's.
I'm not too sure about this but you could restart the wallet with the -reindex to check the blockchain. See if it helps.
On my second machine that was stuck at 608 I did the following:
- made sure I have the latest wallet running: v0.8.54.0-unk-beta
- closed the wallet
- deleted folder ./memorycoin (!!! but beware not to delete your wallet if you got some MMCs!!! If so make a backup before!!! )
- restarted the wallet
- did "addnode 180.183.155.90 add" and "addnode 103.11.49.151 add"
- waited until blockchain was downloaded from scratch
all synced now

... but wondering now why block 609 takes so long...
Thanks to the both of you. I'm trying -reindex on the linux instances and will delete the mentioned folder (- wallet.dat) if it fails.
I already deleted everything except wallet.dat on my W7 desktop, and am waiting for it to sync. Will update once it does.
Update: Success! I'm on the right fork on the desktop (blocks 610, difficulty 0.00000178).
Still waiting for the linux instances to "reindex". If that fails I'll try deleting 'peers.dat' as FreeTrade suggested.
Update #2: Success! Linux instances are now on the correct fork. After waiting 1 hour for "reindex" to do its thing, I decided to try method #2 instead. At first I tried to simply delete 'peers.dat', but I still got stuck on the old fork. So I went ahead and deleted everything from the .memorycoin folder (except wallet.dat) which did the trick!