XAMPP v1.5.2 - eAccelerator: Could not lock

[duhshuh]

I have XAMPP v1.5.2 installed and I am currently running PHP 4 to take advantage of eAccelerator; however, I just took a look at the Apache logs and it is filled with the following eaccelerator error entries:

Could not lock.
Could not release lock.

What exactly does this mean and how can I fix it?