irregular black border around pictures

[skyper]

I get irregular black borders around pictures after reprojection. This is annoying working with overlapping pictures and this border should be transparent.

You can see it right away with only one picture and another background (Bing).

Have a look at #8246 for an example picture.

I also noticed that this picture is misaligned about some metres compared to the piclayer but I am not really sure which one is wrong.

[EDIT]:
I did open the picture with both plugins in its projection (Gauß-Krüger 3) and they show up on the same possition. E.g. the reprojection of either data or picture does not work.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2012-12-04 02:31:51
Last Changed Author: Don-vip
Revision: 5611
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-12-04 00:43:04 +0100 (Tue, 04 Dec 2012)
Last Changed Rev: 5611

Identification: JOSM/1.5 (5611 de)
Memory Usage: 403 MB / 592 MB (118 MB allocated, but free)
Java version: 1.6.0_24, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: ImportImagePlugin (29028)
Plugin: geotools (29026)
Plugin: jts (28945)
Plugin: log4j (28968)
Plugin: utilsplugin2 (28807)

[skyper]

screenshot