From an interview with Clint Hocking, Creative Director, Ubisoft Montreal in the February 2009 issue (#190) of GameInformer magazine, page 14:

:

SirSlaysALot: Why did you decide to include respawning enemies at all the guard posts? CH: This issue was raised by one of the programming leads late in the development cycle, but my feeling at the time was that it was not an issue. I knew it was happening, but the number of places in which it was noticeable was small. In fact, the number of places where you notice it is small - it is just that they almost all happen to be very close to safe houses that are frequently visited en route to and from major objectives, meaning that almost every player encounters these few places in almost every mission. We didn't do anything intentionally to make it that way, but we also didn't do anything to fix it, and that was my fault because I misestimated the severity of the issue. In hindsight, having read numerous reviews of the game, this issue seems to be the single largest problem with the game, and it is frustrating for a lot of the players. It makes me a bit sad to think that this one slightly mishandled, moderately scoped technical design issue seems to have such a powerful influence on the overall perception of the game when I feel we did so many things well. I guess that's the challenge of making hugely ambitious games - you're juggling a lot of plates and it's very hard to pull off the perfect finish.

* Mobo: EVGA nVidia nForce 780i SLI FTW (132-YW-E178-A1)
* CPU: Intel Core 2 Quad Q9450
* RAM: Corsair Dominator 4GB (2 x 2GB) DDR2 1066 (PC2 8500)
* Video: XFX GeForce GTX280 XXX Edition (GX280NZDDU) (2 in SLI)
* Sound: Creative Sound Blaster X-Fi XtremeGamer
* PSU: Thermaltake Toughpower 1,000W
* HDD: WD Caviar 500GB 7200 RPM (2 in RAID 1)
* Optical: Asus DVD Burner with LightScribe
* Optical: Asus DVD-ROM
* CPU Cooler: Rosewill RCX-Z775-EX
* Case: Antec 900
* Fan Speed Controller: Zalman MFC1 Plus-B 6 Channel
* Monitor: Samsung 2443BW (24", 1920 x 1200)
* OS: Microsoft Windows 7 Home Premium 64-bit
* Keyboard/Mouse: Logitech Cordless Desktop MX 5500 Revolution
* Speakers: Logitech Z-5500 Digital 5.1

2010
02.09.2010: Bioshock 2 (PC)
Q1 2010: Assassin's Creed 2 (PC)
Q1 2010: Metro 2033 (PC)
Q1 2010: Silent Hunter V (PC)
Q1 2010: Singularity (PC)
Q1 2010: Splinter Cell: Conviction (PC)
Q3 2010: Alpha Protocol (PC)
TBA 2010: Red Dead Redemption (360)
TBA 2010: Star Wars: The Old Republic (PC)

2009
04.07.2009: Riddick: Dark Athena (PC) - 7.0
08.19.2009: Shadow Complex (XBLA) - 8.5
10.27.2009: Forza 3 (360) - 9.5
10.27.2009: Torchlight (PC) - 8.0
11.24.2009: Modern Warfare 2 (PC)
Q4 2009: Divinity 2 - Ego Draconis (PC)
Q4 2009: S.T.A.L.K.E.R.: Call of Pripyat (PC)

2008
09.16.2008: Crysis Warhead (PC) - 9.0
09.22.2008: Civ IV: Colonization (PC) - 8.0

PS3
Demon's Souls
God of War III
Heavy Rain: The Origami Killer
inFamous
Killzone 2
Metal Gear Solid 4
Resistance: Fall of Man
Resistance 2
Uncharted: Drake's Fortune
Uncharted 2: Among Thieves