Can you use framework-less Flex 3 SWCs within CS3? I assumed that you
could do this if the compatibility-version flag was used and you
didn't use any of the Flex framework. I haven't been able to get this
to work, however. I asked about this about a month ago and the
all-knowing Matt Chotin said it should work, so I'm hoping there's
something I'm missing.

A colleague of mine, Crystal West, created this example to show the issue:

http://deitte.com/swc_test.zip

The example has two SWCs within it, one created using Flash Authoring
and one created using Flex 3. Try compiling swc_test.fla with just
flash_bc_ads.swc in the same directory (that is, remove
flex_bc_ads.swc). The fla should compile fine. Then try with just
flex_bc_ads.swc. You should get compile errors related to AdTranslator
class, etc.

She tried a lot of variations on compiling with flex_bc_ads.swc, and
nothing worked. flex_bc_ads.swc was built using the compatibility
flag and doesn't use any of the Flex framework. She also tried
compiling the Flex SWC using compute-digest=false (as recommended by
Tim Walling
http://timwalling.com/2007/10/22/compiling-flash-cs3-compatible-swcs-with-flex).
That didn't work either, and, according to some of the comments on
this blog post, didn't work for others.

Any suggestions?