It's normal, in fact that round was done an hour after your post, and then another block was found in ten hours.
The pool hashrate is lower than it was a few weeks ago, currently 84 Ghash/s. You get payouts less often, but they are worth more.

Let's calculate the expected round time:

Pool hashes per second: 84,000,000,000
Pool hashes per hour: 302,400,000,000,000
Bitcoin average hashes per block solve: 7,635,483,000,000,000 (at current difficulty)
= Average pool round: 25.25 hours

So blocks solves (and their payouts) average once a day at the current total hashrate. With variance, this means you might get some rounds 1/3 this length, and some 3x this length.

Here's a link to the statistics page mentioned above.
You can compare the number of shares per round to the current difficulty, 1777774. It's been a while since a really long round.

(From the hashrate graph, it also looks like some dumb pool hoppers are still jumping on at the start of new rounds, although with the PPLNS payout method they don't earn more for their work than anyone else. You also don't need to quit mining just because a round is longer than expected; if you do, you will miss out on maximum earnings when a block is found.)