There is not a separate download for Vista. There is a thread about it in Tech Support
here.
Some of the known problems:
- If you have problems with it crashing/freezing while reading PMs, Stefan says installing Graal to a folder that doesn't have any spaces in its name and renaming Graal4.exe to something longer than 8 characters (like Graal4blah.exe) may help.
- If Graal crashes immediately when you try to run it, I've found playing music in Winamp to help.
- There's also a problem with Graal just randomly crashing, but there is no known workaround right now.
- Another problem is parts of the GUI appearing black or garbled and having errors about not being able to lock the DirectX surface in the log window that appears when you press F2. No known workaround for this one.
- Some people have also had problems with animated flower tiles appearing black (probably related to the problem above).
- Some people also do not get sound (no known fix)
- Graal may sometimes freeze when opening the options window or copying text from the F2 log window.