Whenever I break blocks, part of the Project Red Integration module, I experience a client crash. This causes no corruption to the world.
The blocks that I experienced this on, were:
Timer
Toggle Latch

I was getting the Toggle latch problem with the modpack I made. However, the same thing seems to be happening with my FTB DW20 pack

The most confusing problem is the fact that this doesn't happen initially in the world, but starts occurring after a couple days!

A crash log would be useful.

OK. I'll try to cause the crash again! ;)

Surprisingly, when I reopened MC, my world disappeared. I have a feeling that it is corrupt. This crash seems to cause random effects. Sometimes it just crashes the client and causes no damage. Sometimes it crashes and causes corruption. Sometimes, it does nothing. Also, for more information, the timer was placed on a wall!
I was able to recover the world by creating a new world with the same name.
I couldn't attach the log, so here is an excerpt
2014-04-19 08:29:07 [INFO] [STDOUT] #@!@# Game crashed! Crash report saved to: #@!@# /home/yash/Downloads/ftb_ultimate_2/Direwolf20_1_6_4/minecraft/crash-reports/crash-2014-04-19_08.29.07-server.txt
2014-04-19 08:29:07 [INFO] [Minecraft-Server] Saving chunks for level 'DevCraft I'/The Moo Moo Farm
2014-04-19 08:29:07 [WARNING] [IC2] EnergyNet.removeTileEntity: appeng.me.tile.TileController@4f1d8eb4 (appeng.me.tile.TileController@4f1d8eb4) wasn't found (added), skipping
2014-04-19 08:29:07 [WARNING] [IC2] EnergyNet.removeTileEntity: appeng.me.tile.TileController@38b9ca26 (appeng.me.tile.TileController@38b9ca26) wasn't found (added), skipping
2014-04-19 08:29:07 [INFO] [ForgeModLoader] Unloading dimension 0
2014-04-19 08:29:07 [INFO] [ForgeModLoader] Unloading dimension -1
2014-04-19 08:29:07 [INFO] [ForgeModLoader] Unloading dimension -31
2014-04-19 08:29:07 [INFO] [Minecraft-Server] Stopping server
2014-04-19 08:29:07 [INFO] [Minecraft-Server] Saving players
2014-04-19 08:29:07 [INFO] [Minecraft-Server] Saving worlds
2014-04-19 08:29:07 [INFO] [ForgeModLoader] The state engine was in incorrect state SERVER_STOPPING and forced into state SERVER_STOPPED. Errors may have been discarded.
AL lib: (EE) alc_cleanup: 1 device not closed

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x0000000000000000, pid=5004, tid=140127936435968

JRE version: OpenJDK Runtime Environment (7.0_51) (build 1.7.0_51-b00)

Java VM: OpenJDK 64-Bit Server VM (24.45-b08 mixed mode linux-amd64 compressed oops)

Problematic frame:

C 0x0000000000000000

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

An error report file with more information is saved as:

/home/yash/Downloads/ftb_ultimate_2/Direwolf20_1_6_4/minecraft/hs_err_pid5004.log

why did it become so big?!

#@!@# Game crashed! Crash report saved to: #@!@# /home/yash/Downloads/ftb_ultimate_2/Direwolf20_1_6_4/minecraft/crash-reports/crash-2014-04-19_08.29.07-server.txt
Please provide this file, you can upload to pastebin.com or similar services.

why did it become so big?!
As it states on GitHub "Comments are parsed with GitHub Flavored Markdown"
Some of the text was interpreted as formatting notations, in future use fenced code block notation

Reopen with a proper log.

Sorry for the delay. I had a drive failure that I needed to rescue to get MC to boot. I got a log, and put it on pastebin ;)
http://pastebin.com/pQPBPhxE

Good luck! BTW, I want to get into Forge development, but as a noob in Java, I am confused where to start!

You're using an old version 4.2.2 #19. use version 4.3.5 #30 or later.
Download: http://projectredwiki.com/wiki/Version_archive