I have downloaded the blockchain from cryptochainer.com, and now the client just writes 'out of sync' and does nothing (but it shows 19 active connections to the Clam network). Of course, stacking does not work.
I've not heard of that site before. [Edit: I checked it out; couple of problems: 1) it's a zip archive of the CLAM client's data directory after syncing the blockchain; you have to trust the site not to have planted fake utxos in their db; you're better off downloading a bootstrap file and processing it yourself. 2) it only contains 1686 MB of block data whereas the CLAM blockchain currently has 2193 MB of data, so it's quite out of date. ]
I just updated my copy of the CLAM blockchain here:
https://bitcointalk.org/index.php?topic=623147.msg9772191#msg9772191The CLAM client gets stuck occasionally. If you stop and restart it when it gets stuck it should eventually sync.
Xploited is working on a new version of the CLAM client which should be a lot better at syncing, but it's not ready for release yet.