Should one laugh or cry?
These are real, observed messages from software:
iTunes
New versions are always a treat. The 11.01. version of Apple's iTunes asked me this when I wanted to delete a spurious audio file from its library:

Anyone knows what this means?
Excel
Excel sometimes can't paste, but it can detect the problem and warn you:

What about fixing the bug instead? And who can have written such a strange bug...
Cinema 4D
David Pogue is right when he says: I want to sense that an English major lost sleep over the wording of the dialogue boxes. Cinema 4D, an excellent 3D modelling program, had this to say to me:

Hmmm… which button do I press now?
X
One I have not yet caught in the act (because it only asks me when I install it) presents me with an awkward choice:
Are you in the US or in Canada? |
[Yes] [No] |
What it presumably wants to ask is:
Choose in which region you are: [US and Canada] [rest of the world]
Adobe
Adobe's updater works behind the scenes, seldom letting you catch an update file. It is also prone to this:

Windows
On 27 October 2002 I saw this in the window of a major bank in central New York:

All the nice advertising screens in all of the bank's windows had stopped. Perhaps just as well.
Windows 95
Windows95 on Virtual PC, a long time ago, suggested:

Wow. Actually I can even do it between Mac OS X and Virtual PC Windows applications.
Applescript
Very useful explanations are to be found in the Applescript dictionaries:
icon family : A family of icons
icon view options : the icon view options
column view options : the column view options
list view options : the list view options