Tracktype grade 5 nearly invisible on satelite imagery

[josm@…]

Using imagery from Geoportal I've found grade5 tracks nearly invisible. I'm attaching a screenshot.

Revision: 7480
Repository Root: http://josm.openstreetmap.de/svn
Last Changed Author: Don-vip
Last Changed Date: 2014-08-31 23:51:24 +0200 (Sun, 31 Aug 2014)
Build-Date: 2014-08-31 21:55:55
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 7480

Identification: JOSM/1.5 (7480 pl) Windows 8.1 64-Bit
Memory Usage: 927 MB / 1780 MB (325 MB allocated, but free)
Java version: 1.8.0_11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Djosm.home=.josm/]
Dataset consistency test: No problems found

Plugins:
- PicLayer (30436)
- alignways (30416)
- buildings_tools (30485)
- editgpx (30416)
- measurement (30416)
- reverter (30521)
- turnrestrictions (30454)
- wikipedia (30449)

Last errors/warnings:
- E: Failed to locate image 'Waypoint'
- E: Failed to locate image 'Waypoint'
- E: Failed to locate image 'Waypoint'
- E: Failed to locate image 'Waypoint'
- E: java.io.IOException: Server returned HTTP response code: 502 for URL: http://mapy.geoportal.gov.pl/wss/service/img/guest/ORTO/MapServer/WMSServer?FORMAT=image/jpeg&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=Raster&STYLES=&SRS=EPSG:3857&WIDTH=500&HEIGHT=500&BBOX=2164417.1904022,6410677.5505898,2164525.8404293,6410786.2006169. Przyczyna: java.io.IOException: Server returned HTTP response code: 502 for URL: http://mapy.geoportal.gov.pl/wss/service/img/guest/ORTO/MapServer/WMSServer?FORMAT=image/jpeg&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=Raster&STYLES=&SRS=EPSG:3857&WIDTH=500&HEIGHT=500&BBOX=2164417.1904022,6410677.5505898,2164525.8404293,6410786.2006169