Net results for me...
It works great until block 1781476. It then runs into an error.
If I had to guess though, I would say this is when the client hits a kind of 2GB windows file limit, an error is flagged and the client then goes into syncing mode instead of importing blocks from the bootstrap.
It could be an issue with 2GB filesize limit I guess, or a signed 32 bit variable in the code perhaps. 2^31 = 2147483648.
I would suggest putting "connect=0" in the clam.conf to stop the client ever going to "live sync".
I eventually synced. Since I don't use the wallet, I will try a couple of tests.
First, I am using: v1.4.17
Looking in logs, I see the client reaches 751 Orphan blocks. It gets a bunch more, but each one is numbered 751. Basically locks up.
I see others have taken the advice of connect=0 I will run that tonight just as another test / confirmation that it may resolve the issue. Of course, a client update would be needed to make no connections while it is importing blocks.