Right click the track (after highliting it)
Click 'Select Whole Track'
Click Track - Consolidate Audio Region

I, like Mac, am pretty sure that track is a bunch of audio chunks.
You can look at the number of Events on a track by hovering your mouse right beside the track number (not on it).
You should see a popup like the image below.
Consolidate will make the track one continuous chunk. This helps, especially noticeable if rendering tracks with certain FX.

After consolidating (and selecting whole track as mentioned above)try rendering again.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
events.jpg (31.98 KB, 31 downloads)
Last edited by rharv; 02/14/14 05:57 PM.
I do not work here, but the benefits are still awesome
Make your sound your own!