change in time format can cause issues?

6/28/2012 08:02:17:577 0 214 0 some job Job started.
6/28/2012 08:02:18:218 0 214 0 some job Job finished.
6/28/2012 08:02:18:452 0 0 0 [default] Queue Manager Job #257 - waiting for the process to complete
6/28/2012 8:02:21.905000 0 257 0 some job Job started.
6/28/2012 8:02:23.358000 0 257 0 some job Job finished.
6/28/2012 8:06:13.254000 0 268 0 some Semaphore file(s) some file found. Submitting job to the queue.
6/28/2012 8:06:13.598000 0 268 0 some Job started.

these log entries are found in the schedule.log, i wonder what could have caused the change in the time format and whether it could cause any issues?

thanks,
liang zhu

I see slightly different format for the time portion, but I don't think that is an issue