My client crashes when I drink from a flask of Vanity's Emptiness. This issue happened both when in creative and in survival. I am using Botania r1.4-155, and I have only tested this in SSP.

crash log: http://pastebin.com/gdPxDrA8

Mind using NEI to make a data dump for your potion ID's? Should be under the NEI options, accessible from the button in the lower left side of the inventory screen. I recall the data dumps are under "Tools",but I might be wrong.

Here is the list of all used potion IDs:
http://pastebin.com/9btUb3ph

In the botania config file, shift the potion effects to 91-98. Where they are now, it's out of bounds and causing this crash.

That fixed the issue, thank you for the help.