Recent WinUAE versions are slower than for example WinUAE 0.8.8.
- UAE's main goal is compatibility, not speed.
- many Amiga subsystems are now emulated (nearly) cycle-exactly in newer versions
  (copper, bitplanes, sprites and floppy). Cycle-exact emulation is usually more complex = slower.

WinUAE 0821 is much slower than 0817
- make sure your JIT cache and CPU speed settings are correct.
  Some old configuration files are not 100% compatible with 0821 and newer releases.
  (Usually JIT cache size resets to 0 and CPU speed to "Match A500 speed")

Sound problems
- make sure sound buffer size is at least 3 or higher
- unfortunately some OS, sound card and sound card driver combinations have bad sound,
  independant of sound settings.

My CDROM drives are not anymore visible in 0821
- "Add PC Drives at Startup" does not anymore add any removable devices
- you need to install Amiga CDFS and tick "usescsi.device emulation"-checkbox
  in misc-page. Confirmed working CD filesystems are for example IdeFix97, AmiCDFS
  and CacheCDFS. Set device name to "uaescsi.device" and unit to 0. (some setups'
  unit number may not be zero, especially if you have scsi devices. You can enable
  debugging and look winuaetxt.log for correct unit numbers)

Picasso96 problems: "Could not create graphics board context"
- set enough RTG memory (graphics memory in emulated display board)

Strange bar in right side of screen
- disable horizontal and vertical centering. They cause display problems
  if selected resolution is higher than 640x480.

Refresh rate selection box only shows "Default" and VSync box is disabled
- your display driver doesn't support DirectDraw refresh rate selection.

"Fast Copper"-option isn't saved
- "Fast Copper" option will be removed in future, option is only meant for debugging.

Game X doesn't want to save/load to disk
- game probably uses non-standard save format, use "Custom Floppy" image instead of
  "Standard Floppy" for save disk.
  
MakeCD freezes at the end of burn with my IDE burner
- download latest version of MakeCD and add
  "MAKECD_ATAPI" and "MAKECD_NO_DCR" to MakeCD's icon tooltypes