Schedule Slip: While the comic advertises that it's updated every Monday, this seems to be the case much more rarely nowadays. Lampshaded in the "Left Behind" comic, as well as the randomly-changing page titles.
The main comic seems to update, at its most frequent pace, about once a month, mostly because of Scott's busy con schedule, which he only has because of VG Cats, the comic he barely updates anymore. Ow...
Getting better... At 18 comics per 52 weeks, that's a nice batting average of 34% of Mondays.
Total updates in 2010: 18 - 9 VG Cats, 9 Super Effective.
Total updates in 2011: 18 - 8 VG Cats, 10 Super Effective.
Total updates as of June 26, 2012: 14 - 9 VG Cats, 05 Super Effective.
They may not be scheduled, or on Mondays but they're getting more frequent now.
As of December 18th 2013, 7 VG Cats. Scott's toddler is doubtless contributing to how busy he is.