Once again Bruce came to the rescue. With the 12F675 and using the internal oscillator, I <b><i>must</b></i> add the line:
<code>
DEFINE OSCCAL_1K 1
</code>

This is required to tell PBP to fetch and use the factory calibarted value. Even though I had calibrated the value, without the above DEFINE, I wasn't even using it!

Everything works just fine now.

Thanks again for the help Melanie,

Don