Pronunciation of "applicable"
My Webster's gives them both as variant pronunciations, with the stressed first syllable being preferred. Both mean the same thing, and are identical apart from the pronunciation.
You say tomato, I say tomahto ...
The NOAD reports /ˈæpləkəbəl/ as the pronunciation of the word in American English, and /əˈplɪkəb(ə)l/, /ˈaplɪkəb(ə)l/ as the British pronunciation.
In /əˈplɪkəb(ə)l/, the accent is on the second "syllable" (Ap-PLIC-a-ble); in /ˈæpləkəbəl/ and /ˈaplɪkəb(ə)l/, the accent is on the first "syllable" (APP-lic-a-ble).