Using: Droid Bionic 4.04 without Root.
I can use the adb to pull a specific apk file to my PC, for example,
adb pull /data/app/com.google.android.gm-1.apk C:\my-hacks
which pull gmail's apk file. But when I try to copy the entire /data/app directory with
adb pull /data/app C:\myhacks
the command line reads
pull: building file list... 0 files pulled. 0 files skipped.
I don't understand why I have permission to pull specific files from /data/ but not everything.