File dialog won't open files whose names start with "~". E.g., create a file named "~foo.txt" and try to open it in any KDE app.
The tilde character is the UNIX way to reference the home directory. http://en.wikipedia.org/wiki/Tilde#Directories_and_URLs
*** Bug 262385 has been marked as a duplicate of this bug. ***
Found another filename that doesn't work: ".txt (I know it's a special character, but it's a valid filename.)
Dima, that's bug 185433.
*** Bug 144220 has been marked as a duplicate of this bug. ***