[GR] Wrong user-agent strings

I just tested 1.5.1-b19 with G2.2-svn.
When connecting standalone GR with G2, I see these user-agent strings in the apache agent log:

Gallery Remote 1.5.1-b19:
- used for the first two requests (HEAD /gallery2/gallery_remote2.php and GET /gallery2/main.php?g2_controller=remote.GalleryRemote&g2_form%5Bcmd%5D=no-op)

RPT-HTTPClient/0.3-3E:
- used for some POST /gallery2/main.php

Java/1.5.0_04:
- used for all core.DownloadItem requests

The slideshow applet uses these agents:
Mozilla/4.0 (Windows XP 5.1) Java/1.5.0_06:
- for java resource downloads (e.g. "GET /gallery2/modules/slideshowapplet/applets/GalleryRemoteHTTPClient.jar )
- for core.DownloadItem requests

Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1) Gecko/20061010 Firefox/2.0:
- for the no-op command (GET /gallery2/main.php?g2_controller=remote.GalleryRemote&g2_form%5Bcmd%5D=no-op)
- this is the userAgent which was specified to GR by the embedded HTML arguments

RPT-HTTPClient/0.3-3E:
- for POST /gallery2/main.php requests

Same for the upload applet:
Mozilla/4.0 (Windows XP 5.1) Java/1.5.0_06:
- for java resource requests

Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1) Gecko/20061010 Firefox/2.0:
- for the GET based no-op request

RPT-HTTPClient/0.3-3E:
- for add-item upload POST requests

Note (maybe related, but I don't think so):
- I can upload files via GR and the upload applet, i can add albums via GR, i can download the thumbs via GR
- But I cannot view the slideshow. Neither in GR nor in the slideshow applet.