Here is a sample of the 1.2.1 Xcode plugin build IPA:

[build] $ zip -r -T -y MyApp-Alpha-380-dSYM.zip MyApp.app.dSYM
adding: MyApp.app.dSYM/ (stored 0%)
adding: MyApp.app.dSYM/Contents/ (stored 0%)
adding: MyApp.app.dSYM/Contents/Info.plist (deflated 52%)
adding: MyApp.app.dSYM/Contents/Resources/ (stored 0%)
adding: MyApp.app.dSYM/Contents/Resources/DWARF/ (stored 0%)
adding: MyApp.app.dSYM/Contents/Resources/DWARF/MyApp (deflated 69%)

Here is the output of the 1.3.1 release Xcode plugin build IPA:

[build] $ zip -r -T -y MyApp-Alpha-416-dSYM.zip /Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/ (stored 0%)
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/Contents/ (stored 0%)
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/Contents/Info.plist (deflated 52%)
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/Contents/Resources/ (stored 0%)
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/Contents/Resources/DWARF/ (stored 0%)
adding: Users/Shared/Jenkins/Home/jobs/MyApp/workspace/build/MyApp.app.dSYM/Contents/Resources/DWARF/ExpediaBookings (deflated 69%)