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I have an Arduino Pro Mini as an ISP programmer with the ArduinoISP sketch running on it (19200 baud), and an addition in boards.txt that has a 'Standalone ATMEGA328 8MHz Internal' entry that specifies 8MHz and a bootloader file, along with some other things.

 I'm trying to upload a simple blink sketch to an ATMEGA328 (not 328p, though the issue persists with that board as well) with no external components (internal clock)

## The Problem

I can flash the bootloader no problem. I can also upload code the first time just fine. The problem is when I try to upload any different code _after_ the first time, it gives a verification mismatch error at a seemingly random byte, complaining that 0xsomebody != 0xsomeotherbyte (also seemingly always different). This usually causes the sketch the stop working, and the LED to behave erratically. 


## IDE Verbose Outputs 

[Verbose output for burning the bootloader](http://pastebin.com/AT6mDvFm)

[Verbose output for first upload of simple sketch: basically Blink.ino](http://pastebin.com/t05eQ3hC)

[Verbose output for second upload of modified sketch: changed first delay to 1200](http://pastebin.com/SR0nfunn) (side note: uploading an identical sketch doesn't give the verification mismatch error)

[Verbose output for sufficiently different sketch (four digital writes, ie heartbeat example)](http://pastebin.com/TAPp2aQd)

## The Sketch

 void setup() {
 pinMode(6, OUTPUT);
 }
 
 void loop() {
 digitalWrite(6, HIGH);
 delay(1100);
 digitalWrite(6, LOW);
 delay(400);
 }

## Bootloader Files

This is the boards.txt entry that I'm using:

 ##############################################################
 
 atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
 
 atmega328bb.upload.protocol=arduino
 atmega328bb.upload.maximum_size=30720
 atmega328bb.upload.speed=19200
 
 atmega328bb.bootloader.low_fuses=0xE2
 atmega328bb.bootloader.high_fuses=0xDA
 atmega328bb.bootloader.extended_fuses=0x05
 
 atmega328bb.bootloader.file=atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
 atmega328bb.bootloader.unlock_bits=0x3F
 atmega328bb.bootloader.lock_bits=0x0F
 
 atmega328bb.build.mcu=atmega328
 atmega328bb.build.f_cpu=8000000L
 atmega328bb.build.core=arduino:arduino
 atmega328bb.build.variant=arduino:standard
 
 
 atmega328bb.bootloader.tool=arduino:avrdude
 atmega328bb.upload.tool=arduino:avrdude

I've added this entry to `Users/me/Local/Arduino/packages/arduino/hardware/avr/1.6.17` as well as `Program Files(x86)/hardware/arduino/avr`

Here's the [HEX file](http://pastebin.com/7Qkp2CYi) for the bootloader incase that's useful as well 

## The Programmer

Here's a schematic of the programmer:

[![Schematic-Programmer][1]][1]
[![ISP-Header][2]][2]

The solder jumper 'CAP1' is soldered closed.

And the connections to the ATMEGA328



![schematic](https://i.sstatic.net/8ABK2.png)



And lastly, a photo of the setup: [![PCB-Programmer][3]][3]

Thanks in advance


 [1]: https://i.sstatic.net/zu2t4.png
 [2]: https://i.sstatic.net/AT59h.png
 [3]: https://i.sstatic.net/MTXIA.jpg

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