Latex error on recent dev branch

[Tatsuro M. <tma...@ya...>]

I have met the following LaTeX error on the recent dev branch. 
*********************************************************************
! Package ucs Error: Unknown Unicode character 8520 = U+2148,
(ucs)                possibly declared in uni-33.def.
(ucs)                Type H to see if it is available with options.

See the ucs package documentation for explanation.
Type  H <return>  for immediate help.
 ...

l.15507 \verb~"\U+2148"~ & A + Bⅈ
                                    & Unicode DOUBLE-STRUCK ITALIC SMALL I \\
*********************************************************************
Please give me a hint to overcome this.

Tatsuro