Comment 3 for bug 1278561

On OS X 10.7.5, with default (new) prefs and en_US locale:
- not reproduced with 0.48.4 r10009
- not reproduced with 0.48+devel rev <= 12552
- incorrect scaling and positioning with 0.48+devel rev >= 12555

The effects on my system though are different than described by Alvin, for each of the steps:
- the regression is already triggered on first unit change
- 'px' -> 'mm': flowed text is offset, flowRegion scaled up, font size the same
- 'mm' -> 'px': flowed text reverts to old position, flowRegion back to original size
- 'px' -> 'mm': same as in step 2
- 'mm' -> 'cm': flowed text is displaced (outside page), flowRegion scaled up even larger, but font size stays the same
- 'px' -> 'm' -> 'px': text disappears (truncated: flowRegion repositioned to SVG origin, scaled to a very tiny rect)
- (…)

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updated version of comment #2, fixes typo