It's very difficult to publish a book without any errors. Yes, there will be typos. In BESM 3, there have been several more significant errata issues identified to be so far.
The first is a simple math error in the Slime template (page 117). Features was indicated as costing 2 Points/Level instead of 1 Point/Level, meaning that the template should be +7 Points instead of +10. In keeping with units of 10 for all templates, I suggest making this simple change: all Slimes have an additional 3 Features of their choice to reflect the sub-races/colour of slimes. This adds +3 Levels of Features, which is +3 Points. The template cost is now correct at +10.
The second one is an even small math error. The Guardians Gryphon (page 124) should have an unarmed Damage Multiplier of 14 rather than 8 to account for its Superstrength.
The third errata is a formatting issue in three tables:
* Table 11-2: Attack Situation Modifiers (page 154)
* Table 11-3: Defence Situation Modifiers (page 154)
* Table 12-2: Armour (page 168)
The PDF proof that I had before Adam sent the files to White Wolf shows the tables formatted correctly, so I'm unsure where the problem crept in. I'm sure that White Wolf will have an errata section on their website, but until they do, I have uploaded the pages to my website. Please note that I'm doing this as a service to the fans, rather than to step on WWP's ownership of BESM.
You can visit the errata download page by clicking here.