[patch] This diff file demonstrates problem location and solution.

solution.patch (text/plain), 734 bytes, created by timbrain on 2005-10-02 23:56:55 UTC

--- /usr/share/vim/vimfiles/syntax/gentoo-package-use.vim	2005-10-03 08:42:46.813330272 +0200
+++ gentoo-package-use.vim.new	2005-10-03 07:54:35.920287781 +0200
@@ -27,7 +27,7 @@
 syn match  GentooPackageUseAtom /^[^ \t\n#]\+-\S\+\/\S\+/
 	    \ nextgroup=GentooPackageUseUse,GentooPackageUseUnuse skipwhite
-syn match  GentooPackageUseUse contained /[a-zA-Z][a-zA-Z0-9\-_]*/
+syn match  GentooPackageUseUse contained /[a-zA-Z0-9][a-zA-Z0-9\-_]*/
 	    \ nextgroup=GentooPackageUseUse,GentooPackageUseUnuse skipwhite
-syn match  GentooPackageUseUnuse contained /-[a-zA-Z][a-zA-Z0-9\-_]*/
+syn match  GentooPackageUseUnuse contained /-[a-zA-Z0-9][a-zA-Z0-9\-_]*/
 	    \ nextgroup=GentooPackageUseUse,GentooPackageUseUnuse skipwhite