Ha! It does scroll! Complete log follows below. The status bar says "Reserving Track." I left it alone for an hour before giving up - status bar never changed. Here's the log:
I 23:06:40 Microsoft Windows 7 Professional x64 Edition (6.1, Build 7601 : Service Pack 1)
I 23:06:40 Total Physical Memory:16,677,808 KB - Available: 14,556,208 KB
W 23:06:40 Drive Z:\ (FAT) might not support single files > 4 GB in size.
I 23:06:40 Initialising SPTI...
I 23:06:40 Searching for SCSI / ATAPI devices...
I 23:06:41 -> Drive 1 - Info: PIONEER BD-RW BDR-205 1.12 (E:) (SATA)
I 23:06:41 Found 1 BD-RE!
I 23:07:13 Operation Started!
I 23:07:13 Building Image Tree...
I 23:07:14 Calculating Totals...
I 23:07:14 Preparing Image...
I 23:07:14 Contents: 1,120 Files, 35 Folders
I 23:07:14 Content Type: BD Video
I 23:07:14 Data Type: MODE1/2048
I 23:07:14 File System(s): UDF (2.50)
I 23:07:14 Volume Label: [Not Configured]
I 23:07:14 Size: 47,475,568,171 bytes
I 23:07:14 Sectors: 23,182,098
I 23:07:14 Image Size: 47,482,667,008 bytes
I 23:07:14 Image Sectors: 23,184,896
I 23:07:14 Operation Successfully Completed! - Duration: 00:00:00
I 23:07:18 Operation Started!
I 23:07:18 Building Image Tree...
I 23:07:22 Calculating Totals...
I 23:07:22 Preparing Image...
I 23:07:23 Contents: 1,120 Files, 35 Folders
I 23:07:23 Content Type: BD Video
I 23:07:23 Data Type: MODE1/2048
I 23:07:23 File System(s): UDF (2.50)
I 23:07:23 Volume Label: PROMETHEUS
I 23:07:23 Size: 47,475,568,171 bytes
I 23:07:23 Sectors: 23,182,098
I 23:07:23 Image Size: 47,482,667,008 bytes
I 23:07:23 Image Sectors: 23,184,896
I 23:07:25 Operation Successfully Completed! - Duration: 00:00:06
I 23:07:25 Operation Started!
I 23:07:25 Source File: -==/\/[bUILD IMAGE]\/\==-
I 23:07:25 Source File Sectors: 23,184,896 (MODE1/2048)
I 23:07:25 Source File Size: 47,482,667,008 bytes
I 23:07:25 Source File Volume Identifier: PROMETHEUS
I 23:07:25 Source File Volume Set Identifier: 4238B8E90161C112
I 23:07:25 Source File Application Identifier: ImgBurn v2.5.7.0
I 23:07:25 Source File Implementation Identifier: ImgBurn
I 23:07:25 Source File File System(s): UDF (2.50)
I 23:07:25 Destination Device: [0:0:0] PIONEER BD-RW BDR-205 1.12 (E:) (SATA)
I 23:07:25 Destination Media Type: BD-R (Disc ID: CMCMAG-DI6-000)
I 23:07:25 Destination Media Supported Write Speeds: 2x, 4x, 6x, 8x
I 23:07:25 Destination Media Sectors: 24,438,784
I 23:07:25 Write Mode: BD
I 23:07:25 Write Type: DAO
I 23:07:25 Write Speed: MAX
I 23:07:25 Hardware Defect Management Active: No
I 23:07:25 BD-R Verify Not Required: Yes
I 23:07:25 Link Size: Auto
I 23:07:25 Lock Volume: Yes
I 23:07:25 Test Mode: No
I 23:07:25 OPC: No
I 23:07:25 BURN-Proof: Enabled
I 23:07:25 Write Speed Successfully Set! - Effective: 35,960 KB/s (8x)
I 23:07:25 Advanced Settings - Optimal Writing Speed: No