gistfile1.txt

$ epubcheck epub.epub 
Epubcheck Version 1.0.5

ERROR: epub.epub: length of first filename in archive must be 8, but was 31
ERROR: epub.epub/OEBPS/content.opf(8): unfinished element
ERROR: epub.epub/OEBPS/Text/main.xhtml(28): text not allowed here
ERROR: epub.epub/OEBPS/Text/main.xhtml(28): unfinished element
ERROR: epub.epub/OEBPS/Text/main.xhtml(53): unknown element "center" from namespace "http://www.w3.org/1999/xhtml"
ERROR: epub.epub/OEBPS/Text/main.xhtml(55): required attributes missing
ERROR: epub.epub/OEBPS/Text/main.xhtml(57): element "br" from namespace "http://www.w3.org/1999/xhtml" not allowed in this context
ERROR: epub.epub/OEBPS/Text/main.xhtml(58): unknown element "center" from namespace "http://www.w3.org/1999/xhtml"
ERROR: epub.epub/OEBPS/Text/main.xhtml(60): required attributes missing
ERROR: epub.epub/OEBPS/Text/main.xhtml(70): unknown element "center" from namespace "http://www.w3.org/1999/xhtml"
ERROR: epub.epub/OEBPS/Text/main.xhtml(72): required attributes missing
ERROR: epub.epub/OEBPS/Text/main.xhtml(74): element "br" from namespace "http://www.w3.org/1999/xhtml" not allowed in this context
ERROR: epub.epub/OEBPS/Text/main.xhtml(75): unknown element "center" from namespace "http://www.w3.org/1999/xhtml"
ERROR: epub.epub/OEBPS/Text/main.xhtml(77): required attributes missing
ERROR: epub.epub/OEBPS/Text/main.xhtml(55): 'OEBPS/img/2010/08iij/system.jpg': referenced resource exists, but not declared in the OPF file
ERROR: epub.epub/OEBPS/Text/main.xhtml(60): 'OEBPS/img/2010/08iij/iij-press-fig-2.gif': referenced resource exists, but not declared in the OPF file
ERROR: epub.epub/OEBPS/Text/main.xhtml(72): 'OEBPS/img/2010/08iij/dc-img.jpg': referenced resource exists, but not declared in the OPF file
ERROR: epub.epub/OEBPS/Text/main.xhtml(77): 'OEBPS/img/2010/08iij/iij-press-fig-1.gif': referenced resource exists, but not declared in the OPF file

Check finished with warnings or errors!