We need a command to reload the UI. Why? so you can mod the UI with EQ2 still open, type in /reload_ui or whatever, and see changes immediately!
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Paxil help

of you /loadui and then zone (suspecting you didn't CTD) does anything change?

/loadui

Causes crashes when certain actions are taken, but some windows will work fine when using this.

If the window you're testing doesn't work after /loadui, the quickest method I've found is:

/camp
/loadui (folder)
(finish camping)
(log back in)

Edit: /loadui default no longer needed.

i was thinking about seeing if zoning really does load the whole ui agian, but havent researched it yet...
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YourAngel cam

Mook's full function zone mod leads me to believe the answer to your question is no.

Also, if just doing /loadui doesn't cause a crash immediately, zoning after doing /loadui will. /loadui while camping (or just exiting the game and restarting if you're using Mook Login) is still the fastest method.