HTTPService memory leak using both resultFormat e4x and xml

Steps to reproduce:
1.download the zip file
2.import as a project
3.profile using e4x or xml resultFormat
4.create 2 memory snapshots from the Flex profiler
5.use "Find Loitering Object" View between the 2 snapshots.
6.analyse String objects using "Open Objects Reference"

Note : Forcing GC cannot remove Loitering String Objects

UrlLoader is accumulating String objects on each refresh of data which cannot be GC .
The attached screenshot shows the URLLoder string variables.