I can also mention that the blank spaces do not correspond to missing games, i.e. I still see all the same games, in the same order, as in the list view. It's just that the spacing/layout algorithm somehow decided to skip a space for some strange reason.
Grid View games irregular/missing
The condition persists over a logout/login and browser close. It also persisted when my total games just increased from 32 to 33.
Also, the alignment of the games goes slightly off-grid when the player's name is long enough to spill the game header into two lines:

Somebody mentioned they saw this yesterday, I just got it myself. I've been using this view and it's been working normally for the last day and a half until I saw it just now. It persisted after a page reaload. FireFox 10.0.2