I, too, have been having this exact same issue. While in the Base Editor, the item previews on the bottom panel are all blank, white squares. Also, the item previews in the right side window show up as just a white square. Basically, any time a base item image would be shown, it appears as a white square (this includes the "Add Personal Item" option whether I'm logged on as SG leader or not). Furthermore, it happens in both my bases - one on Victory and the other on Freedom.
I've tried everything that I could think of or that's been suggested to me including:
-Verify Files
-Safemode
-Uninstalling / Reinstalling City of Heroes
-Upgrading video card
-/unloadgfx & /reloadgfx in game
-Turned all graphics settings DOWN
-Turned all graphics settings UP
-Logged onto a friends account and checked his base, same dilemma
The thing is, this really came out of nowhere. One day I logged into the game, editted my base with no issue then the next time I tried, I experienced this bug and it's been happening ever since. I didn't change anything, it just happened. I've seen that it's a somewhat common problem for MAC users, but I'm using a laptop with Windows. It does have an Intel chipset, which I know has caused problems for some, but other than this base editor bug, the rest of the game runs fantastic. Every other aspect of the game is fine, I just can't see base item previews (a minor issue, yes, but an annoying one at that).
My question is this: Does anyone else have any suggestions as to how to correct this issue -AND- is anyone else experiencing it (that's not using a MAC)?
Thank you to all that read this, hopefully we can get to the bottom of this.