Block chain finished loading day before yesterday, and new mining entries are accruing; but I see a message in the small window at the bottom of the UI that says the block chain checkpoint is too old. I ran repair wallet and it fixed an entry. I let it continue to run in hopes it would fix itself in a day or 2, but it has not.

20:54:11

getcheckpoint


20:54:11

{
"synccheckpoint" : "f19d64603d4144ce4c9db07b109cdf95cfa4110e0809c966a887c731153547f1",
"height" : 1274551,
"timestamp" : "2015-03-01 16:18:35 UTC"
}

I tried to use the open debug log file to provide the last entry here, but it will not open ( file in use by another process). If need those entries I can stop the process and snip a few.
Pls advise
Thanks