[Explorers] Changed/bugged U-maps since GWEN update

I'm getting/seeing questions about areas that seem to be 'unexplorable' since the GWEN update.

Since they show up on my original U-maps and are now 'unexplored', I consider them bugs.
I did a check with someone of my guild on one of the spots and it stays unexplored.

Known spots so far:
- Regent Valley, right under the Old Ascalon portal
- Iron Horse Mine, area where Minaar Stonesledge is during the Minaar's Trouble quest and the path west of that spot
- Frost Gate mission, south east corner (there is a white 'lake' in the corner in on the original U-map).
- D'Alessio Seaboard mission beach area (submitted by Duaric).
- Bloodstone Fenn mission, right after the last vinebridge and mantle abbot.
We were doing a guild HM there and the path was and remained covered.
- Twin Serpent Lakes, north west corner now has fog, as does the east wall. The rock formation above the portal from mission outpost also has a slight green 'fog' on it.
- Stingray Strand, the water on the east side is now clear blue.
- Riverside mission, west wall at bonus tower has fog, the south wall has more fog, the water at the last towers has less detail
- Sanctum Cay, the water (west, north) has less detail, the little beach on the east coast is now covered, the details in the bay are gone, the south-east corner had an island, it's gone
- Amnoon Oasys, the sea is less explored and the little point on the south is now covered


- Spots in Lornar's Pass (by Duaric, no details given and I don't have a good U-map to compare to)


If you find more spots, post them below. I can compare most of them to older U-maps and my current mesmer's map. If they are bugged, I add them to the list.

added 1 Aug 2007: Bloodstone Fenn
added 2 Aug 2007: D'Alessio mission and Lornar's Pass
added 5 Aug 2007: Iron Horse Mine

The beach area of Alesssio Seaboard Mission, plus a few spots have been noticed in Lornars pass. It is my guess Anet tweaked the map, by using unnecessary pixels to make room for added Areas to the Tyrian map for GWEN. As I know have 98.1 with only missions after Seaboard left.