[OS X TeX] warnings in using a beamer class

[정 달영]

Hi all,

I run pdftex(a latex file containing beamer class, pgf style files) and 
got following warnings.
How can I remove those warnings?

Thank you.

Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
(hyperref)                removing `\endgroup' on input line 13.
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
(hyperref)                removing `\<let>-command' on input line 13.
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
(hyperref)                removing `\<def>-command' on input line 13.
.......

Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
(hyperref)                removing `\afterassignment' on input line 17.
.......

Warning: pdflatex (file 
/usr/local/teTeX/share/texmf.local/fonts/map/pdftex/upd
map/pdftex.map): invalid entry for `uytu32': too big value of 
ExtendFont (2)
.......

LaTeX Font Warning: Font shape `OT1/cmss/m/it' in size <6> not available
(Font)              Font shape `OT1/cmss/m/sl' tried instead on input 
line 30.
.......
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