[Google Chromecast] bhiga:
Something is wrong with your zip. It has way too many files that shouldn't be there. Looks like you have a zip of an entire directory.

Proper 20PwnedCast-13300-V1.zip should be 79.0 MB (80,910 KB in Windows Explorer or 82,852,213 bytes in properties).

Strongly recommend re-downloading the PwnedCast zip from the PwnedCast thread.

...or looks like you might have the 20PwnedCast-13300-V1.zip in the Chromecast-Root folder.

Here's what a good FlashCast log for a PwnedCast v1.0 install should look like, notice how there are only 4 files inflated:

Reading recovery parameters
Looking for mods on /dev/sda1
Resetting crash counter and boot mode
Clearing OTAs
Copying /usr/share/flasher/remove-ota to /tmp/tmp.ap9bJb
Flashing mod at /tmp/tmp.ap9bJb
Mounting cache (mtd4) at /tmp/tmp.HnvpoD
Removing temp-ota.zip and ota.zip from cache partition (/tmp/tmp.HnvpoD)
Unmounting /tmp/tmp.HnvpoD
Removing temporary mod directory /tmp/tmp.ap9bJb
Mounting /dev/sda1 to /tmp/tmp.tEdPe1
Opened log file /tmp/tmp.tEdPe1/flashcast-logs/flashcast-1.log
Found eureka_image.zip, using
Extracting /tmp/tmp.tEdPe1/eureka_image.zip (zip) to /tmp/tmp.saoE41
Archive: /tmp/tmp.tEdPe1/eureka_image.zip
inflating: boot.img
inflating: eureka_recovery.img
inflating: imager.sh
inflating: system.img
Flashing mod at /tmp/tmp.saoE41
PwnedCast-13300-V1-R7: Imager.sh now running
PwnedCast-13300-V1-R7: Flashing Kernel...
Flashing boot.img to kernel (mtd2)
PwnedCast-13300-V1-R7: Flashing Recovery...
Flashing eureka_recovery.img to recovery (mtd6)
PwnedCast-13300-V1-R7: Flashing System...
Flashing system.img to rootfs (mtd3)
PwnedCast-13300-V1-R7: Deleting boot.img and system.img to free up space in /tmp so we can mount SquashFS
PwnedCast-13300-V1-R7: Mounting System Partition
Setting up squashfs union at /tmp/tmp.hTXAEq
PwnedCast-13300-V1-R7: Setting Build Revision
PwnedCast-13300-V1-R7: Replacing Recovery File in System Image
grep: /tmp/tmp.saoE41/mod_options: No such file or directory
PwnedCast-13300-V1-R7: Mounting UserData Partition
Mounting userdata (mtd5) at /tmp/tmp.NGWmeC
PwnedCast-13300-V1-R7: Copying Unique SSH Keys to System
PwnedCast-13300-V1-R7: Unmounting UserData
Unmounting /tmp/tmp.NGWmeC
PwnedCast-13300-V1-R7: Done editing System, Writing Changes...
Reflashing squashfs union at /tmp/tmp.hTXAEq
Parallel mksquashfs: Using 1 processor
Creating 4.0 filesystem on /tmp/tmp.hTXAEq/repack.sqfs, block size 131072.

Exportable Squashfs 4.0 filesystem, gzip compressed, data block size 131072
compressed data, compressed metadata, compressed fragments, no xattrs
duplicates are removed
Filesystem size 69465.63 Kbytes (67.84 Mbytes)
53.57% of uncompressed filesystem size (129668.14 Kbytes)
Inode table size 20378 bytes (19.90 Kbytes)
27.79% of uncompressed inode table size (73325 bytes)
Directory table size 19108 bytes (18.66 Kbytes)
43.15% of uncompressed directory table size (44286 bytes)
Number of duplicate files found 145
Number of inodes 1786
Number of files 1316
Number of fragments 75
Number of symbolic links 381
Number of device nodes 0
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 89
Number of ids (unique uids + gids) 5
Number of uids 4
root (0)
default (1000)
unknown (1013)
unknown (1001)
Number of gids 5
root (0)
default (1000)
unknown (1013)
unknown (1001)
unknown (1006)
Flashing /tmp/tmp.hTXAEq/repack.sqfs to rootfs (mtd3)
PwnedCast-13300-V1-R7: Script Finished!
Removing temporary mod directory /tmp/tmp.saoE41
Flashing succeeded
Rebooting
Unmounting and removing /tmp/tmp.tEdPe1