BASH Redirect (STDOUT & STDERR) Syncing

[Hal Vaughan <hal@thresholddigital.com>]

I'm running a Perl script and redirecting the output to a file, and 
redirecting STDERR to the same file, like this:

myprog >capture.txt 2>&1

And I've noticed that the error output is not in sync with STDOUT.  Is there 
any way, when doing a redirect like this, to synchronize the output, so I can 
tell when (in relation to STDOUT) the error messages were output?

Thanks!

Hal