i know this has been mentioned a few times by others about the creature research CTD that happens with F4 activated, and the solution was ro disable F4 and delete and extra stacks of the item so you only have 99 or fewer for the one item. but i'm having issues with getting rid of the extra stacks, it wont let me go into the inventory and delete them there and when i go to a vendor to sell them they aren't listed in the valuables section, but i've discovered that they are still registered in that section of the sale menu as when i bought a few things and then selected "sell all" (when i didn't have anything in there at the time) i got a hole heap of money.
can anyone offer any assistance?
thanks
Those items not showing up in valuables list is not a trainer issue, it's the game function. That change seems to have gone live with the last patch and I assume it was done because all research items used to go into junk section (or "Valuables") by default and people used to sell them off to vendors before they managed to turn them in. Thus, most likely, there were complaints about it on official forums and BW changed this. Now the research items go to... well, hell knows where they go as I can't find them anywhere in my inventory either. At least I'm not selling them to the vendors by accident. As for "Sell All" giving bunch of cash and showing a whole heap of items on vendor, then that's the F4 option - you sell a single item, get cash and that single item is turned into stack in your inventory. You sell again and this time you're selling a whole stack, while getting another stack in your inventory. It's an "easy way" to make money like this, just click "Sell All" few times.
All I can suggest is do not use "Max crafting items" option (F10), instead use "Infinite potions" option (F4) when you get materials. This way you will never lose any material you gather and you can always sell that single or couple of items to vendor to get a full stack back. When turning in research items, make sure that the option(s) are turned off.