If you're using Flex Builder 3 on Windows Vista, you may have
noticed a new behavior where the navigation tree automatically
scrolls horizontally to show the items you're hovering over. This
"feature" did not exist in previous versions of Flex Builder. If
you're like me, you growl and curse every time it happens.
This isn't Adobe's fault, it's a new Windows Vista "feature"
that was enabled by the Eclipse editor that Flex Builder is based
on. If this feature annoys you, please go comment and vote on the
In the meantime, you can fix this behavior by running Flex
Builder in Windows XP compatibility mode. In your start menu, find
your flex builder icon, right click and select "open file
location". In the folder that opens, find Flex Builder.exe, right
click on it and select properties. Under the Compatibility tab,
check "Run this program in compatibility mode for:" and select
Windows XP Service Pack 2. Press OK and restart Flex Builder 3. You
should not see any more annoying horizontal scrolling in the tree.