Crafting maximums
Currently the maximum attainable craft level is 100. This was last changed in December 2003. Certain items have a craft cap over 100.
On a single character, it is impossible to fully specialize in multiple crafts. Each character has a pool of 40 points he can allocate to his crafts above 60. So for example, one could be 100 in a craft and 60 in the rest. Or, 80/80 and 60 in the rest. Or 75 in 2 crafts, 70 in a third, and so-on.
If a character gains a skillup which would put him above 40 allocated points, points will be deducted from the other highest craftskill above 60. Since skillups past 60 are never more than 0.1, this will always happen in increments of 0.1.