How to work around the "slowdown" bug by Allister
1. Save game and reload. (Fixes the problem only for about an hour
and then you are back where you started)
2. Go to www.tweakfiles.com.
From there download a little program called Cacheman, set the memory
to "Power User", and it will have the game a) speed up
load times, and b) put off memory leak problems by nearly doubling
the amount of time you can play before unloading data from the cache.
3. Do a full install. (For some reason, doing a full install does
everything solution 2 does, but permanently.)
Also, some people have reported that running with the desktop set
to 16 bits color seems to solve the problem for them. This doesn't
seem to work for everyone though.