Font mapping confusion

Question

Regularly use FM7.2 to dtp multilingual documents. All these documents use the WinXP truetype Arial font with multilingual support, eg Arial Baltic, Arial Greek, Arial CE, Arial CYR, Arial EE, etc.
Have recently upgraded to CS3 versions of Illustrator, In-Design and also installed FM8.0 to try out before fully committing.
Have to make further adjustments to an FM7.2 document in Russian that used Arial CYR (truetype). Cannot now open this document and get characters to display properly. If I install a cyrillic postscript font and reformat document to use this font, it will then display correctly.
Under normal circumstances this would be impossible. How can FrameMaker remap the characters from WinXP truetype+multilingual support to a postscript font? Cannot now open any documents correctly that use the system truetype fonts with multilang support.
Need help urgently to resolve as cannot reformat client docs to use postscript instead of truetype fonts.

Answer 1

Thanks for keeping on top of this one.
Have already done thorough check of codepage fonts. These entries all in registry along with Courier, Times New Roman, Arial Narrow, etc.
Remember having to do this manually a few years back, IIRC something to do with MSWord not displaying CYR, Greek, CE, etc.
Should have said before, am using WinXP SP2 and ATM Deluxe.
All WinXP truetype fonts stay in the Windows\Fonts folder. All postscript fonts are kept in psfonts folder.
Whenever installing new programmes or updates, the Windows\Fonts folder tends to fill up, so I always move the postscript fonts out to the psfonts folder and have also created a separate tt_fonts folder to store all the truetype fonts (except for WinXP fonts). ATM Deluxe activates both postscript and truetype fonts (without copying font to Windows\Fonts directory). The only fonts ATM does not handle are OpenType fonts with ".otf" as it does not recognise these so they have to be manually copied to Fonts folder to activate.
The only recent changes made to my system were CS3 upgrades and installation of FM8. Upgraded to Acrobat 8 a few months ago and the only immediate setback experienced was pdf bookmarks incorrectly displaying the multilang headings workaround for this was to copy heading directly from pdf document and paste into bookmark.
If all the CS3 products and FM8 recognise the full (unicode) character set of "Arial" truetype (now opentype), could there be other registry changes that affect the way FM7.2 maps in the characters?
Have always kept tight control of fonts, do not allow font substitution and whenever creating pdf have 'set to cancel' if it cannot find font.
Have been trawling though Adobe database and forums attempting to find out what to try next.