Are Khmer Unicode characters displaying incorrectly in OpenOffice? When you use a Khmer spelling checker do squares show up intermingled with Khmer script? The problem is the default GUI font does not contain all the characters of the Khmer Script.
1) To fix the display problem go to Tools>Options…>OpenOffice .org>View and uncheck “Use system font for interface”.
2) Then go to Tools>Options…>OpenOffice .org>Fonts and check “Apply replacement table”. Type “Andale Sans UI” in the box under “Font” (it isn’t in the list) and then select a font that contains a full Khmer character set under “Replace with” (we recommend using the Khmer SBBIC System font).
3) Click the green tick mark.
4) Then go to Tools>Options…>OpenOffice.org>View and make sure that “Use system font for user interface” is NOT checked and click “OK”
Then (if needed) re-boot OpenOffice and it all should look great!
Also, if you see gray spaces between words (they are non-breaking spaces), just click on the “View” menu and choose “Field Shadings” to disable them (or Ctrl+F8).