I'm using FB4 under OSX and for the longest time it refused to load and just displayed errors instead of panes. Nothing that I could find would fix it (including reinstalling). Well, it looks like that problem has been resolved in some update, because it has gone away, and I can go back to viewing projects.
The problem is now when I try to build the project I get the error:
Source locator does not exist: com.adobe.flexbuilder.debug.sourceLookupDirector.flash
Any ideas? My familiarity of eclipse is pretty limited and I don't know what a source locator is. TIA.
Looks like those classes are missing from your Flash Builder installation.
Can you check in installdir/plugins/com.adobe.flexbuilder.debug.xxx/com/adobe/flexbuilder/debug/
If those files are missing, do a complete uninstall and then install.