I'm using MC9.1.316 and I've noticed some odd problems recently.
First, I get stuttering during playback, which I'd never noticed before.
Second, I get jumpy mouse cursor movement and an unresponsive keyboard when MC is the foremost window. I'm using an Acer IR wireless keyboard with built-in pointing device. The strange thing is that mouse pointer and keyboard will work fine in windows explorer, but as soon as MC is the foreground window, things get really jumpy. Switching out of MC to another program is slow, but as soon as the other program has focus, things go back to normal. This happens regardless of whether MC is playing music or not.
(CD burning is still not working, but I think I'm on the track of a solution)
Media Center 9.1.316 -- C:\Program Files\J River\Media Center\
Microsoft Windows XP 5.1 Service Pack 1 (Build 2600)
Intel Pentium 4 2593 MHz MMX / Memory: Total - 1014 MB, Free - 638 MB
Internet Explorer: 6.0.2800.1106 / ComCtl32.dll: 5.82 (xpsp1.020828-1920) / Shlwapi.dll: 6.00.2800.1276 / Shell32.dll: 6.00.2800.1233 (xpsp2.030604-1804) / wnaspi32.dll: 4.71 (0002) , ASPI for Win32 DLL, Copyright © 1989-2002 Adaptec, Inc. / Aspi32.sys: 4.71 (0002)
Ripping / Drive D: Copy mode:Normal CD Type:Auto Read speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: No / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: No / Play sound after ripping: No
Burning / Drive D: PLEXTOR DVDR PX-708A Addr: 1:0:0 Speed:40 MaxSpeed:40 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: No
Use playback settings: No / Normalization: None