B5 paper size in libspectre-0.2.6 is not correct

Binary package hint: libspectre1

Description: Ubuntu 11.04
Release: 11.04

Affected packages:
a) libspectre1 - 0.2.6-1build1
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Possibly also
b) libpoppler13 - 0.16.4-0ubuntu1.1
c) evince - 2.32.0-0ubuntu12.1

Problem description:

According to the source code of libspectre-0.2.6 (11.04 edition of Ubuntu) there is a problem with the interpretation of B5 paper size.

Namely in: libspectre-0.2.6/libspectre/ps.c, structure papersizes (lines 136-158)

B5 paper size is defined as 516x729 which corresponds to 516/72 inch x 729/72 inch size. This size is however JIS B5, not standard ISO B5 paper size, which should be cca. 499x709, or more precisely 176mmx250mm.

For more paper information about (standard/JIS) paper sizes:
http://en.wikipedia.org/wiki/Paper_size

Manual page of gs (contains the table of papersizes interpreted by gs):
http://linuxcommand.org/man_pages/gs1.html

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This causes problem, when a test document is created in latex forcing to have b5paper size -> compiled to dvi -> dvips -t b5 produces a ps file which gives not correct dimensions of document when displayed in evince, in particular it provides 182 mm x 257 mm, i.e. JIS B5, but requested dimensions were ISO B5, i.e. 176 mm x 250 mm. When a pdf file is created via ps2pdf, the dimensions are correct.

As the attachment, I am sending the following files:
1) aaa.tex (Latex source)
2) aaa.dvi (produced by the command latex aaa)
3) aaa.ps (produced by dvips -t b5 aaa)
4) aaa.pdf (produced by ps2pdf aaa)

Symptoms in Evince:
a) the ps file gets wrong paper size in document info (JB5)
b) the pdf file's paper size is correct (B5)

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