You can not restore an event - you restore the iPhoto library - if you have disk space it is best to keep both until you are sure that the restore was good - see http://support.apple.com/kb/HT1427?viewlocale=en_US&locale=en_US for TM instructions - basicallhy you launch TM, go back to the time you want to restore from, select the iPHoto library and click restore
no blank thumbnails; just a blank event box with a gray generic pic of island trees.
Regarding restoring the entire library...I am afraid I will loose tons of Christmas photos that I just imported if I restore to a previous library in my TM that would have the Thanksgiving photos that I am trying to restore.
Did you try rebuilding the library's database file as follows: make a temporary, backup copy of your library if you don't already have one (Control-click on the library and select Duplicate from the contextual menu) and apply the two fixes below in order as needed:
Launch iPhoto with the Command+Option keys held down and rebuild the library.
Since only one option can be run at a time start with Option #3, followed by #4 and then #1 as needed.
Using iPhoto Library Manager to Rebuild Your iPhoto Library
1 - download iPhoto Library Manager and launch.
2 - click on the Add Library button, navigate to your Home/Pictures folder and select your iPhoto Library folder.
3 - Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File ➙ Rebuild Library menu option.
4 - In the next window name the new library and select the location you want it to be placed.
5 - Click on the Create button.
Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments. However, books, calendars, cards and slideshows will be lost. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.