Sounds like other weapons have had this issue before, but wanted to make the powers that be aware of it.
On my 48th level Corruptor - Archery/Trick Arrow, I did a respec to pick up a travel power and rearrange some other things. No issue, but Superspeed has the glowing patch on the ground, so I went to base to turn that off and the costume NPC. Opened up my costume slot 1 (they are all the same) and got to primary/secondary power... EVERY SINGLE POWER showed 10K cost of CHANGE (plus the 10K charge for making the change).
I went to see what I could change and NONE of the powers in either set allows you to change color or anything. I don't even HAVE several of the powers (and never have) that it wants to change. So, why is the system wanting to charge me 190K for NOTHING?
I dropped out of the base into Atlas, ran over to Icon there to see if that would do anything different, but no... It still showed the same changes/charges.
I can afford it (I've also got 10 free costume change tokens), that isn't the issue, but this should NOT be happening. I tried some of the other costume slots (2, 3 and 6 in fact) with the same results. Tried shutting down the game and restarting the game, but it had no effect. Not sure what to make of it.
Oh one more thing, I haven't played her in awhile but I went and got my Trick Arrow/Archery Defender and took her to the base to see if her powers would show up needing to be changed. Nope, doesn't show any charges/changes for her powers. Guessing something is messed up on the corruptor, but still lets me on and powers all work seem to work as expected (I'm not logging anything, so if something small is off I might not realize it).