I don't have a crash, but a bug none the less. I'm playing on a heavily modified 1.7.10 with Forge 1208. I just found your mod and really like it. I downloaded and installed the Full version. While in game I noticed that when I dropped an item with Q I would drop 2-3 items instead of only 1. If I held down Q it would drop 1-2 of the item selected, then if I scrolled to another item and released Q it would drop whatever I scrolled to as well. The Lite version however does not have any problems, so I'm more than happy using it.

Yes, someone reported this bug on minecraftforum as well. Could you give me a full list of all your mods and could you try it without any mod?

I found the bug, not using my craftingmanager mod and itemphysic causes this bug :D. I will fix this soon. If you want to fix this issue now, install the newest version of craftingmanager.

Sure thing. Having only Forge and ItemPhysic Full, still caused the bugs I described. However the issue related to scrolling to an item while still holding the Q button seems to have an effect I didn't notice while using more mods. Here's a video I recorded that helps show what has been happening for me.
in the video: At 0:20 I'm pressing Q once and dropping multiple items. At 0:37 I try to scroll to another item while holding down Q. At 1:01 I noticed that I didn't have to scroll to another item to have the bug shown at 0:37 to occur.

Also, here is my ModPack. It is a private pack I set up on Technic. The pack is currently hidden so it will not show up when searching Technic for ModPacks. I intend to make the pack public once I have mod authors permissions.

• Chicken Shed
• Treecapitator
• Damage Indicators
• Floating Ruins
• Starting Inventory
• Lucy Blocks
• Immibis Advanced IC2 Machines
• Adventurers' Amulets
• Ars Magica 2
• Applied Energistics 2
• Backpacks
• Back Tools
• Better Storage
• Bibliocraft
• Bibliocraft Woods (Natura, Forestry, and BoP)
• Big Reactors
• Binnie's Mods
• Biomes O' Plenty
• Blood Magic
• Botania
• Buildcraft
• Carpenter's Blocks
• Chicken Chunks
• Chisel
• CodeChickenCore
• CoFH Core
• CoFH Lib
• Compact Solar Arrays
• Computer Craft
• Dense Ores
• Enchiridion
• Ender Storage
• Extra TiC
• Extra Utilites
• Factorization
• Flat Signs
• Flaxbeard's Steam Power
• Forbidden Magic
• Forestry
• Funky Locomotion
• GraviSuite
• iChun's Hat mod
• iChun's Hat Stand mod
• IC2 Nuclear Control
• iChun Util
• I'm Looking At Blood
• Immibis Core
• Immibis Peripherals
• Industrialcraft 2
• Infinibows
• Inventory Tweaks
• Iron Chests
• Jabba
• Journey Map
• Magic Bees
• Mantle
• Mariculture
• Mine Factory Reloaded
• Mystcraft
• Natura
• NEI Addons
• NEI Plugins
• Nether Ores
• Not Enough Items
• Open Blocks
• Open Mods Lib
• Ore Dictionary Converter
• Pam's Harvestcraft
• PneumaticCraft
• Project:RED (Base, Compatibility, Integration, Lighting, Mechanical, and World)
• Railcraft
• Redstone Armory
• Redstone Arsenal
• Refined Relocation
• Steve's Cars 2
• Steve's Factory Manager
• Tinker's Construct
• Thaumcraft
• Thaumcraft Gates
• Thaumcraft Mob Aspects
• Thaumic Tinkerer
• The Kitchen Mod
• Thermal Expansion
• Thermal Foundation
• TiC Tooltips
• Tinker's Mechworks
• Translocators
• Tubestuff
• Twilight Forest
• Waila
• Waila Harvestability
• Witchery
• Item Physic Lite
• MineTweaker

I considered using the Crafting Manager mod, but ended up going with MineTweaker3 instead. I do really like MinecraftLoader mod, though it causes a massive memory usage. Although I suppose that's a topic for another Issue Tracker.