Seeing that dooglus also posted a file for every 10,000 blocks, I counted up to
https://s3.amazonaws.com/dooglus/bootstrap-199.dat is blocks 1,990,000 through 1,999,999
which is where my problem was happening so i renamed bootstrap-199.dat to bootstrap.dat, ran it and it imported those blocks just fine. Once it was done I reinserted the full bootstrap.dat file and opened clam wallet again and it was importing blocks again for a while, but I ran into the same problem so I just downloaded the next few files and appended them, it is easy enough
That's funny. I just stopped updating the partial files because I never heard of anyone finding them useful. I guess I'll reinstate them.
My suspicion is that the single large file isn't working well on Windows. Are you running the CLAM client in Windows?