buildid:
2.5.2.v20100203

steps to reproduce:
1. download birt-runtime-2_5_2.zip
2. install reportengine.
3. runandrender attached sample report using command:
   ./genreport.bat --mode runrender --format pdf --output [smoke]_test1.pdf --parameter "sample=hello" --parameter "cust=100" test1.rptdesign

expected result:
the exported pdf file size is about 342kb.

but in 2.5.2 rc1 m-build, the exported pdf file is only 76kb.
it's about 5x size larger now in rc2 candidate build.
created an attachment (id=158006)
sample report design
from 2.5.2 rc2, pdf output started to support svg image. in the old version, the svg chart will be generated as a png image in chart side. now, chart will send engine svg image directly.

so, this is the expected result.

btw, from birt all-in-one, the viewer will send the supported image formats list to pdf render option, in which "svg" is not included. so, in all-in-one, the pdf file is still 76k.
verified in daily build 20100208-0630. bug closed.