Found an issue with the 1.5 release of Quark/ARL 1.3-19- if you've got Mekanism installed, simply opening your inventory & clicking on any item crashes the game with the following exception:

java.lang.ClassCastException: mekanism.common.integration.tesla.TeslaItemWrapper cannot be cast to vazkii.arl.interf.IDropInItem
    at vazkii.arl.util.DropInHandler.getDropInHandler(DropInHandler.java:93)
    at vazkii.arl.util.DropInHandler.onDrawScreen(DropInHandler.java:34)

(Full stack trace / crash log: https://paste.dimdev.org/hoduyaguha.mccrash)

Not sure who's to blame exactly, but since it only occurred following the latest update (& judging by the stack trace)- is this something that can be fixed on your end?

Side note: I disabled tesla integration in the mekanism configs in an attempt to find a workaround, but the crash still occurs.

Versions:
Quark: r1.5-126
AutoRegLib: 1.3-19
Forge: 2725
(Mekanism: 9.4.13.349)