I've got a weird thing, currently when I want to open a file, the "Open" button doesn't make anything, i choose another file, same thing.
Finally something happens and everything work, I can open every file I choose.
Also, sometimes the preview in the open file dialog is not displayed.
Another thing about this dialog : sometimes when I choose a file, a dual selection is made : another file is selected, but I do not made any multiple selection, just clic on one file and click on another file.
So not big problems but strange things.
I'm on MacOS 10.5.6.