What type of spellbook?
Mage, Chivalry, Ninjitus, Necromancy, so far all of them as it appears.
Current client?
UO Classic Client 7.0.15.3
The host, what client does that use?
Same
What version of ServUO are you using? Are you using the latest SVN?
Version 0.5 downloaded by GitHub.
Build 5996.24550
Downloaded April 15, 2016 (when I joined Git-Hub)
Miscellaneous Information
I am using the ACC package. If this is causing the problems, let me know.
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Deleted the ACC package, which got rid of duplicates and triplicates of spellbooks.
I can use the Jooku's toolbar for traveling, but if I cast Gate or Recall, the client freezes.
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Searched for answers on here a couple of times, found one where it mentions upgrading the client. So I upgraded mine to 7.0.50 and everything, including the spellbooks, are working just fine.