  We analyze the anomalous behavior in hole-doped cuprates near 1/8 doping in
terms of the commensurate-incommensurate transition of a stripe phase. Based on
an effective Ginzburg-Landau theory appropriate for weak pinning, we calculate
the commensurate-incommensurate transition point and the energies of the phason
and amplitudon collective modes. Using experimentally available parameters, we
estimate the phason gap (pinning frequency), the conductivity and the
contribution of the phason mode to the dielectric function.
