OS X 10.9.1 Update (w/Safari 7.0.1) Released:
Download pages linked:
(BTW: The original (non-machine specific) OS X 10.9.1 download page (DL1707) was later named for 2013 Mac Pros and the generic 10.9.1 D/L page changed to DL1715. Not sure why they didn't just use the later DL1715 for the Dec 19th posted Mac Pro 10.9.1 updater.)
The About the OS X 10.9.1 Update no longer online. (See below for Apple docs on security fixes in OS X 10.9.1, Safari 7.0.1 & 6.1.1.) I updated a rarely used 2012 mac Mini (after a backup) without any immediate issues. (Although after the update/reboot I had a repeat of the Disk Utility boot disc verify not showing a message it completed, but a shutdown/cold start resolved that.) Build number after 10.9.1 update is 13B42.
You can check for OS X 10.9.1 feedback in Apple's OS X Mavericks forum and the specific Desktop or Notebook forum for your mac model. (Not all problem posts are common but 10.9.0 had more than its share IMO, even for a dot zero release. Worse cases were those that lost data on external drives.)
Also remember Browser updates may cause problems with 3rd party plugins/addons. If you have a problem, disable/remove them and/or check for any updates to them.
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