Recently upgraded to OOo 2.3 and now have Open Office freeze when I type in
Khmer Unicode using Writer or Impress. 

The fonts render properly and the file can be saved as normal until I reach the
end of a line. Upon reaching the end of a line, the program freezes and I have
to resort to a "force quit". Similar problems arise with Calc (though I can't
figure out exactly when the freezing is triggered in Calc). The freezing also
occurs when editing Khmer Unicode documents that were written with openoffice
2.1 and 2.2. 

I have typed in Khmer Unicode in Open Office 2.1 and 2.2 (using linux and
windows) in the past with no problems. 

There are no problems whatsoever when I type in English. 

There are no problems whatsoever when I type Khmer Unicode in my non-openoffice
text editor using the same computer (Toshiba M45, Pentium M Processor 740, 1.73
GHz, 2MB L2, 533MHz FSB with 512MB DDR2 SDRAM) with the same OS (Ubuntu 7.10).

I have heard, but not personally tested, that the same problem occurs with
OOo2.3 running on Windows XP.

In "About Openoffice.org" I have the following:
OpenOffice.org 2.3.0
Copyright 2000-2007 Sun Microsystems Inc.
This product has been created by Debian and Ubuntu based on OpenOffice.org.
OpenOffice.org acknowledges all community members, especially those mentioned at
http://www.openoffice.org/welcome/credits.html
openoffice.org-core 1:2.3.0-1ubuntu5.3. Tue November 27 18:52 GMT 2007.