I found what I think is an odd bug in Safari; bring up a web page, then go and print it in the usual way - this brings up the "Print" dialogue box, click on the "PDF" drop-down, and "Save as PDF", which brings up the usual PDF dialogue box. Now select a folder, then click the "New Folder" button, to create a new sub-folder. Normally, this form would be modal and on top of everything else. But it's nowhere to be seen - and attempting to click on anything else just gives the usual "bong" tone, as in, "you've clicked on a non-active area of the screen, you idiot" but the "New Folder" box is nowhere to be seen, and you can't 'tab' to it using Cmd-Tab either - it's like the form is active somewhere, but not selectable? Can anyone else replicate this? It seems to happen any time I go to print to PDF and then try and create a new folder? (Printing to PDF and selecting an existing folder works fine, as expected). This is OS X 10.9, and Safari 7.0 - the "Gold Master". Someone tell me I've not gone mad...?