thumbnail for the replica of a video doesn't show movie watermark

the subject pretty much says it all. when i create a replica of a video, the thumbnail for the replica doesn't show the "film sprocket holes" watermark to help distinguish it from a photo. the thumbnail for the original video does have the watermark. i did a search and no one else seems to have mentioned the same issue, so i don't know if it's a problem with my installation/configuration, or if it just doesn't bother anyone else.

Gallery version = 2.3 core 1.3.0
API = Core 7.54, Module 3.9, Theme 2.6, Embed 1.5
PHP version = 5.2.9 apache2handler
Webserver = Apache/2.2.13 (Fedora)
Database = mysql 5.1.37, lock.system=flock
Toolkits = ArchiveUpload, Exif, NetPBM, Dcraw, Thumbnail, Gd, Ffmpeg, ImageMagick
Acceleration = none, none
Operating system = Linux 2.6.30.9-90.fc11.x86_64 #1 SMP Sat Oct 17 11:25:35 EDT 2009 x86_64
Default theme = matrix
gettext = enabled
Locale = en_US
Browser = Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091105 Fedora/3.5.5-1.fc11 Firefox/3.5.5
Rows in GalleryAccessMap table = 107
Rows in GalleryAccessSubscriberMap table = 36007
Rows in GalleryUser table = 81
Rows in GalleryItem table = 36005
Rows in GalleryAlbumItem table = 1365
Rows in GalleryCacheMap table = 0