Canon IXUS 90 IS User Manual page 190

188
Playback
Cannot play back.
You attempted to play back
images shot with another
camera or images edited
with a computer.
File name was changed
with a computer or file
location was changed.
Images cannot be edited.
Some images shot with another camera cannot be edited.
Movies do not play back correctly.
Movies recorded with high recording pixels and frame rates may
momentarily stop playing if played on slow reading memory cards.
You may experience frame dropping and audio breakup when
playing back a movie on a computer with insufficient system
resources.
Movies shot with this camera may not play back correctly on another
camera.
Reading images from memory card is slow.
Memory card was formatted
in another device.
Computer images that cannot be
played back may play back if they are
added to the camera using the
supplied software program.
Set the file name or location on the
file format/structure of the camera.
Refer to the Software Starter Guide
for details.
Use a memory card formatted in your
camera (p. 168).