Is QB-2013 R8 safe for install, who knows?
Intuit has posted the QuickBooks-2013 R8 maintenance update to their technical support website for product updates. As of the date of this publication, the update is for 'manual download'; however, Intuit has gotten where they begin 'auto updating' QuickBooks and/or pushing out the updates within just a day or two of the manual update post.
As a result of the large number of errors associated with the last few 'maintenance updates', I am recommending that you hold-off downloading and/or installing this update until sufficient time permits testing to determine if any 'programming bugs' exist with this product patch.
Reportedly this R8 product update fixes the 'bugs' within the R7 maintenance release, and those also contained in subsequent 'fixes' pushed out to repair R7 update errors. Intuit indicates that the Release 8 patch will resolve the problems associated with 'billable time', returning the product functionality to where time is sorted by the transaction date posted on the time entry, not any other behind the scenes methodology. The R8 update is also supposed to prevent 3rd party software from experiencing Unrecoverable Errors or Sync Errors.
Because I am recommending that you NOT download or install this R8 update at present, I have elected NOT to include the update link (URL) to the Intuit Support website.