+1 to above post.
I guess the problem arises because you are in a hurry to move your hand over to the next chord, and you shift your hand before your fingers have let go of the chord. Its a matter of timing your 'release' and 'shift'. Also, muting the strings with your picking hand helps a bit. Rest your fingers on the string once you finished picking/plucking the string.
A little bit of that noise on an acoustic is nice as it can add to the 'presence' of you sound, making it sound a little more hi-fi and condenser mic-ed. But if your picking/plucking is faint and the slide noise is too loud, it can get annoying.
As your fluency with the chords build, the noise will reduce - especially for very familiar chords. When I play bossa-nova and the like where complex outstretched chords are the norm, I still get that noise as I am not too used to it.
-- My current rig
Guitar: '98 MIJ Ibanez RG520 QS w EMG 81/60
Amp: Laney LC15R Tube, Fernandes 20W SS
Pedals: MI Audio Tube Zone Overdrive, Boss OD3, CS3, MT2, HM2, DS2, CE5, DD7, TU3, Beta Aivin DD2 Delay, Dunlop Crybaby 95Q, Stranger Vol Pedal, BBE SupaCharger
Others: Yamaha RBX 374 Bass, Yamaha MM-6 Synth, M-Audio Fast Track, Shure SM-57, Heet Sound E-Bow Plus
Wanted(pm if selling): EB VPJr/Boss FV500L,Ibanez w Original/Lo-Pro Edge