If anyone has any idea, please share; I'll do after some test first.
Updated 10/02/2010:
Embaded font still not work in flex 3:
To continue more test and find.
I wan to use my existing flex plugin with Eclipse 3.4, I got problem as describe in this post.
I wanna to try to use both eclipse with the same flex plugin, with Eclipse 3.4 I try to install Flex plugin by Software Updates but I could not.
I found the solution on the net, thanks to Tekool.net
I have removed the Flex plugin and then re-install the flex plugin, point to Eclipse 3.4 and Proceed it with Caution
After done, download the patch provided in Tekool.net (Direct download here)
Replace the plug-in of the patch into Eclipse plug-in of Flex Plug-in
And at Eclipse start up add parameter -clean: eclipse.exe -clean
Or from the Flex launcher add this parameter too:
eclipse.exe -clean -showlocation -vm ...
It's working for me now.