Initial guess for file encoding (utf8)undefined

[Firestar-Reimu]

Initial guess for file encoding (utf8)undefined
(biblatex)                and new guess (UTF-8)	do not match.
(biblatex)	Please set up your document encoding *before*
(biblatex)	loading biblatex.
(biblatex)	The case changing code might not work as expected.

这个现象的产生原因是\documentclass[UTF8]{pkuthss}和\usepackage[utf8]{biblatex}冲突

[CasperVector]

好像没产生实际的负面影响，至少短期内先不管了 - -