With iPhoto 9.4.3, Apple has enhanced the consumer-level photo management app’s Photo Stream support and fixed a handful of bugs. Photos can now be deleted from My Photo Stream by dragging them to the Trash, you can use File > Export to export photos from Photo Stream, and raw images manually imported from My Photo Stream are now editable. On the bug-squashing side of the equation, one fix prevents manually rotated photos from appearing unrotated when shared to Photo Stream, another addresses a crash when syncing to Facebook, a third prevents calendar text from appearing at the wrong size and resulting in order cancellation, and the final one fixes a problem that could cause books to have an incorrect number of pages after rearranging two-page spreads. ($14.99 new from the Mac App Store, free update through the Mac App Store or Software Update, 730.91 MB direct download via Apple’s support page)
Extract Directly from Time Machine
Normally you use Time Machine to restore lost data in a file like this: within the Time Machine interface, you go back to the time the file was not yet messed up, and you restore it to replace the file you have now.
You can also elect to keep both, but the restored file takes the name and place of the current one. So, if you have made changes since the backup took place that you would like to keep, they are lost, or you have to mess around a bit to merge changes, rename files, and trash the unwanted one.
As an alternative, you can browse the Time Machine backup volume directly in the Finder like any normal disk, navigate through the chronological backup hierarchy, and find the file which contains the lost content.
Once you've found it, you can open it and the current version of the file side-by-side, and copy information from Time Machine's version of the file into the current one, without losing any content you put in it since the backup was made.