Comment #1 on issue 215 by [email protected]: ft=sh highlighting thinks . is a valid character in variable names.
http://code.google.com/p/vim/issues/detail?id=215

The Korn shell has . in variable names; bash doesn't AFAICT, but sh.vim anticipates the problem: if you put this in your .vimrc

    let g:sh_noisk = 1

"." will no longer be part of keywords.

Regards, John Little

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