Found first in OOo 3.2RC1 FR under Ubuntu 8.04, confirmed in OOo 3.2 rc4 and
DEV300m70.
Steps to reproduce :
- open a new presentation
- insert a text area and insert some text in it  (eg "sample of text") ; the
default font is Arial in my case, and default size is 18.
- change the color of some part of the text (eg "ample of t")
- select the whole text and copy it by ctrl+C
- open a new text document in Writer, default font is DejaVu serif 12
- paste the text by ctrl+V
- move the cursor before the letter p in "sample" and look at font name, in my
case I see "Lohit Hindi"; I have Arial only for "sam" but not for "ext" at the
end of the text.

Same problem when copying from writer to calc :
- create a new text document and type some text, eg: example of text, with
default font (Times New Roman 12)
- change the part "mple of t" to bold
- copy by ctrl+C the whole text "example of text"
- open a new spreadsheet
- select cell A1 (do not double-click on the cell) and paste by ctrl+V or click
copy button
==> part "exa" is in Arial (default in Calc for me) and the rest "mple of text"
is in Times New Roman