Latest Off By One Unknown user agents:

User Agent PlatformDevice
Mozilla/4.7 (compatible; OffByOne; Windows 98) Webster Pro V3.2 Windows 98Unknown
Mozilla/4.7 (compatible; OffByOne; Windows 98) Windows 98Unknown
Mozilla/4.7 (compatible; OffByOne; Windows 2000) Webster Pro V3.4 Windows 2000Unknown
Mozilla/4.7 (compatible; OffByOne; Windows 2000) Windows 2000Unknown