So, I wrote a simple manager for downloading large numbers of files from indexed websites. At one point, I spawn() a block to the effect of grabbing a file and saving it to the disk. It's spawned so that it can handle multiple files at a time. I don't get any runtime errors, but I do get appcrashes at random points in the "process". Sometimes it will download 30 files and crash, sometimes it will download 200 before it crashes. I'm going to do some tests on different sites to see if the results persist.

Problem Event Name: APPCRASH
Application Name: dreamseeker.exe
Application Version: 5.0.501.1217
Application Timestamp: 5270445d
Fault Module Name: byondcore.dll
Fault Module Version: 5.0.501.1217
Fault Module Timestamp: 52704412
Exception Code: c0000005
Exception Offset: 0009a180
OS Version: 6.1.7601.
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

*Edit 1* I've re-installed this (and other versions) multiple times, and it seems that this happens with 501.1214 and newer, but it does not happen in 500.1213 and older.

*Edit 2* Turning off the new multi-threading feature stops this crash.

I will keep checking this thread in case you want more information from me.