If you were on the site between 2:00 and 4:00 EST this morning (Thursday, March 29), you may have noticed some intermittent site outages. The server on which this site resides was undergoing significant upgrades. These are upgrades which will make the site more stable and responsive. As you play games today you will hopefully find that page loads are faster, and everything runs smoothly.
However, whenever there are significant upgrades, there is always the possibility of unexpected glitches. If you are using any portion of the site and discover that something isn't working right, you can let us know about the problems you're experiencing by visiting the Ask Professor Puzzler page and submitting a report.