This <http://macromates.com/svn/Bundles/trunk/Review/Bundles/ActionScript%203.tmbundle/info.plistis currently clean.
So I'd say you created all the conflicts when you ran your update
script as your working copy contained changes that subversion could
not automatically merge.
[...] Turns out that the default file supplied by Adobe is also inDOS encoding (funny line endings). [...]
I use the Flex SDK versions 2, 3 and 4 and their minor revisions and
I've not had this problem with any of them (running Leopard).
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Junkets for bunterish lickspittles since 1998!