Developers and public testers of the forthcoming OS X Yosemite 10.10.3 release have unexpectedly been notified of a second release this week, this time with build number 14D130a. Normally spaced a week apart, the last update came on Monday with 14D127a -- suggesting that the company is zeroing in on fixes for certain known issues, and perhaps planning a public release in the near future. Testers are cautioned to keep backups current while testing the new beta.