<meta name="viewport" content="width=1007.9999999999999, height=1360.8" />

ERROR(HTM_057): [path to epub]/OEBPS/section_1.xhtml(199,79): Viewport "width" value must be a positive number or the keyword "device-width"
ERROR(HTM_057): [path to epub]/OEBPS/section_1.xhtml(199,79): Viewport "height" value must be a positive number or the keyword "device-height"

For the above viewport declaration in the HTML, I'm getting the below ERROR messages from epubcheck 5.0.0 (this file does not generate an error in epubcheck 4.2.6).

This affects very few of our files (2 out of 4000 FXL files tested) and in my personal opinion, it seems a bit weird to have a viewport in decimals like that. I'd be OK adjusting the error messaging to say whole numbers instead of fixing epubcheck to use floats BUT I'm not the right person to make that call!