After installing the updates on my Windows XP Pro machine with 2 GB RAM and an Intel Celeron 2.2 GHz, my arrangements would stutter, skip, or stop. While the arrangement was playing, if I clicked on anything with my mouse, there would be no response from the computer for 10-20 seconds while the arrangement continue to stutter. I tried adjusting the latency setting, the DXi settings, and the audio driver settings to no avail.

After reading this thread, I turned off the 'Speed up generation of Real Tracks' under Opt.-Preferences-Real Tracks. Everything seems to be working. Thanks for the tip!