Another quickie on EE photo gallery that gave me a bit of a trouble before I figured it out: you might like creating folders for each category in your photo gallery and place all images for that category in its folder.

Well, if you let PHP create the directories, you might get a problem saying EE doesn't have read/write permissions to the destination folder. You go to the folder and check its permissions and --- wait --- it does have 777 permissions.

What's going on?!

No idea, but fortunately there's a simple fix:

Simply delete the folders that PHP created and re-create them manually through your FTP program.