Yeah... I'm stumped. (DBO)
The IMGUR urls resolved to "pieces" of 2 blocks of letters/numbers. After Sekhmet fixed the repeated blocks, piecing it together gives you this: http://imgur.com/1jKxr0E
Taking those 4 letters plus the "marked" letters in the red text of the initial transmission gives you 7 letters. Then I wrote the following javascript to randomly piece those together into another IMGUR url, but so far I can't find a single real image...
Complete thread:
- A New Transmission - 
/Sekhmet/, 
2015-01-21, 02:13 
- ...and here we go... - INSANEdrive, 2015-01-21, 04:32
 - A New Transmission - Mid7night, 2015-01-21, 06:01
 - I think one of those "blocks" was repeated... - 
JDQuackers, 
2015-01-21, 06:54
- I think one of those "blocks" was repeated... - 
ZackDark, 
2015-01-21, 07:03
- I think one of those "blocks" was repeated... - 
JDQuackers, 
2015-01-21, 07:06
- Fixed 
 - 
/Sekhmet/, 
2015-01-21, 07:28
 
 - Fixed 
 - Am I doin it rite? - Mid7night, 2015-01-21, 07:32
 
 - I think one of those "blocks" was repeated... - 
JDQuackers, 
2015-01-21, 07:06
 
 - I think one of those "blocks" was repeated... - 
ZackDark, 
2015-01-21, 07:03
 - Got it - 
ZackDark, 
2015-01-21, 08:22
- Yeah... I'm stumped. - 
JDQuackers, 
2015-01-21, 08:25
- Yeah... I'm stumped. - Samusaaron3, 2015-01-21, 08:59
 - Yeah... I'm stumped. - 
Old Fire Thief, 
2015-01-21, 09:00
- Yeah... I'm stumped. - 
JDQuackers, 
2015-01-21, 09:04
- And then pieced together and flipped - 
JDQuackers, 
2015-01-21, 09:09
- And then pieced together and flipped - 
Old Fire Thief, 
2015-01-21, 09:21
- Anybody bored/not at work want to try this? - 
iconicbanana, 
2015-01-21, 12:28
- Maybe some progress? *EDIT - 
iconicbanana, 
2015-01-21, 12:52
- More Progress? *Edit! - 
iconicbanana, 
2015-01-21, 13:24
- More Progress? *Edit! - 
Mid7night, 
2015-01-21, 14:03
- While we're brainstorming. - 
iconicbanana, 
2015-01-21, 14:17
- While we're brainstorming. - 
Mid7night, 
2015-01-21, 14:53
- While we're brainstorming. EDIT - 
iconicbanana, 
2015-01-21, 15:00
- While we're brainstorming. EDIT - 
Samusaaron3, 
2015-01-21, 15:56
- While we're brainstorming. EDIT - 
iconicbanana, 
2015-01-21, 15:57
- This may or may not be relevant. - 
iconicbanana, 
2015-01-21, 18:04
- This may or may not be relevant. - 
Mid7night, 
2015-01-21, 20:16
- This may or may not be relevant. - iconicbanana, 2015-01-21, 22:06
 
 
 - This may or may not be relevant. - 
Mid7night, 
2015-01-21, 20:16
 
 - This may or may not be relevant. - 
iconicbanana, 
2015-01-21, 18:04
 
 - While we're brainstorming. EDIT - 
iconicbanana, 
2015-01-21, 15:57
 
 - While we're brainstorming. EDIT - 
Samusaaron3, 
2015-01-21, 15:56
 
 - While we're brainstorming. EDIT - 
iconicbanana, 
2015-01-21, 15:00
 
 - While we're brainstorming. - 
Mid7night, 
2015-01-21, 14:53
 
 - While we're brainstorming. - 
iconicbanana, 
2015-01-21, 14:17
 - Double checking screws up everything - iconicbanana, 2015-01-22, 08:04
 
 - More Progress? *Edit! - 
Mid7night, 
2015-01-21, 14:03
 
 - More Progress? *Edit! - 
iconicbanana, 
2015-01-21, 13:24
 
 - Maybe some progress? *EDIT - 
iconicbanana, 
2015-01-21, 12:52
 
 - Anybody bored/not at work want to try this? - 
iconicbanana, 
2015-01-21, 12:28
 
 - And then pieced together and flipped - 
Old Fire Thief, 
2015-01-21, 09:21
 
 - And then pieced together and flipped - 
JDQuackers, 
2015-01-21, 09:09
 
 - Yeah... I'm stumped. - 
JDQuackers, 
2015-01-21, 09:04
 
 - How did you figure that part out? 
 - 
Mariachi, 
2015-01-21, 08:43
- Lucky guess based on Mid7night's post 
 - 
ZackDark, 
2015-01-21, 08:46
- Yay, I helped! ;) 
 - 
Mid7night, 
2015-01-21, 09:37
- Yay, I helped! ;) - 
ZackDark, 
2015-01-21, 09:39
- Yay, I helped! ;) - 
Mid7night, 
2015-01-21, 09:48
- Yay, I helped! ;) - Blackt1g3r, 2015-01-21, 12:20
 
 
 - Yay, I helped! ;) - 
Mid7night, 
2015-01-21, 09:48
 
 - Yay, I helped! ;) - 
ZackDark, 
2015-01-21, 09:39
 
 - Yay, I helped! ;) 
 
 - Lucky guess based on Mid7night's post 
 
 - Yeah... I'm stumped. - 
JDQuackers, 
2015-01-21, 08:25
 - Somebody catch me up - 
Vortech, 
2015-01-21, 09:50
- Somebody catch me up - Xenos, 2015-01-21, 12:13
 
 - A New Transmission - 
General Vagueness, 
2015-01-21, 21:03
- Nicely done - 
Mid7night, 
2015-01-21, 21:35
- Nicely done - General Vagueness, 2015-01-21, 21:53
 
 - A New Transmission - iconicbanana, 2015-01-22, 08:14
 - A New Transmission - dogcow, 2015-01-22, 09:09
 
 - Nicely done - 
Mid7night, 
2015-01-21, 21:35
 - Solved - 
General Vagueness, 
2015-01-22, 10:24
- Ha! - iconicbanana, 2015-01-22, 10:40
 - Wow! Awesome job - JDQuackers, 2015-01-22, 10:57
 - Well done! - Beorn, 2015-01-22, 11:10
 - Awesome! - Mid7night, 2015-01-22, 11:18
 - Well done! - Dagoonite, 2015-01-22, 11:19