actually this happened to me playing GR2:SS, on the map with all the buildings, what is it business district or sumat? basically a city. Whilst playing co-op, theres a section where you gointo this court yard. So i clear out all the enemies arround it and enter from the back knowing I've cleared the area, once I go down the stairs suddenly theyre all over me, coming from an area i know is covered by a team mate, who effectivly would see them coming up the road, or from a dead end... happened twice, the first time i thought i mus tof missed a hidden group, but the second time i made sure it was clear. and there they appeared.
The map is Government District. Ive had that same problem with that court yard. I thought it was just a few i missed, but I cleared it out next time, and there they were when I was going down those stairs. But it wont do it once or twice, but everytime I go back there. Its the part in the game that Ive seen with them respawning like that, and I just start going through the stairs to the west part of the courtyard. But other than that, Im very very very happy with the way GR2 SS turned out. Its way better then GR2, and they brought back alot of the game elements from GR.
WK, Dannik is right about the system's specs and so on so forth. It does it to a few other games, but not as the red x, but its a similer message. For example, and is the real truth. Doom 3 on PC was made for a pentium 4 1.5 proceesor or a AMD Athlon 1500 or higher, those numbers are mininum requierments, and people dont get it running without it. But... I have a Celeron 2.8 AND it runs perfect. It just took a few changing and twisting in the systems data and rerouted where I want some clocking done at, and it made my PC and Doom 3 better then what it was supposed to be. Microsoft does have problems with there XBOX's about putting the same cards, chips, DVD drives and drivers. But just as long I can play games then im happy.