If you have a 3.5" TomTom ONE, XL , IQ Routes etc.. avoid the tomtom 9.026 version from tomtom.
It seems to have some software bugs with the smaller screens. Causes washed out colors and the screen to be off-center.
Several others on other sites have reported same bug.
Use the 8.415 until tomtom gets a fix.
9.051 indeed works fine on 3,5" screens.
If however you find it too slow on your system, a better alternative would be the 8.562 or the evergreen 8.417. I had them running in x40 mode on my Go700 where I could run 9.051 only in x40light mode.
On a 32 MB model you can run 8.562 even with Vocalizer TTS without too many problems.