Comment 13 for bug 1365451

It seems to me that r13709 (trunk only) needs to be adjusted to the "new reality" that 'document units' now are 'display units' again (and do no longer change the document's scale).

With rev >= 13709 changing the display units in document properties affects the scale (on the canvas) of symbols inserted later on - this seems odd to me (display units in trunk rev >= 13748 only affect Inkscape's GUI, not the document's scale):

1) launch current trunk with default (new) prefs, default template
2) open 'Object > Symbols...'
3) select the 'AIGA' symbol set, and insert e.g. the 'Mail' symbol
4) open 'File > Document properties' and change 'Display units' to 'px'
5) repeat step 3

Expected result:
The size of the inserted symbols is the same relative to the page.

Actual result:
The display unit for the GUI affects the scale of the inserted symbol (the symbol inserted with 'px' as diplay unit is much smaller than the one inserted with 'mm' (default) as display units).

Revisiting this report after having encountered a regression in current trunk (r13803) with documents which don't have 'inkscape:document-units' in the document's <namedview> element: symbols get inserted upside-down with rev >= 13709. A test case can be found here:
<https://dl.dropboxusercontent.com/u/65084033/irc/drawing-1-via-pdftocairo-2.svg>