Sign in to an @youtube account when trying to access Android Market

I recently wrote to the fine folks at the Android Marketplace because I was unable to access the store from my Android Incredible.  My account which I also can not sign in or out of has been changed from my email@gmail to email@youtube.com  I am unable to force stop, clear data, uninstall, download from the website, etc.  I am very frustrated and would like to know what to do.  The reply was quick, apologetic, and I hope helpful.  First they acknowledged the issue and told me they are working on a fix. I really appreciated that they are admitting a problem and that they are trying to fix it.  It made my frustration level go down a bit.  Below is the instructions that were given to me.  I look forward to hearing how you made out.

From your home screen, Menu & Settings, Accounts & Sync

account" at the bottom of the screen. 

You may see a @youtube account listed. Tap the account, then tap "Remove

If you don't see an @youtube account listed, not a problem, you can still proceed with the other steps outlined below to resolve the issue.
Clear the cache and data of the Market app and the Download manager.
Here's how:
    - Visit Menu &, Settings &g Applications; Manage applications
    - Tab over to "All"
    - Select the Market app, and then tap "Clear data" and "Clear cache"
    - Select the Download manager, and then tap "Clear data" and "Clear cache"

Temporarily uninstall updates to Android Market by following these steps:
    - From the home screen, go to Menu & Settings; Applications; Manage applications
    - Tab over to "All" (or, if your device is running Android 2.1 or below, press Menu; Filter; All)
    - Scroll down and select the Market app
    - Touch "Uninstall updates"

If the issue persists after taking these steps, you may need to perform a factory data reset on your device. Please note that this will reset your device to its original state. I suggest contacting the Android Customer service before doing this.  While your media content (photos, music, etc.) will not be deleted from the SD card, applications and their related data will be uninstalled.

To perform a factory reset:
1) Go to Home; Menu, Settings; Privacy (or Phone storage; depends on the device)
2) Press "Factory data reset"
3) Press "Reset phone"

After you perform the factory reset, make sure you sign into your device with the same primary Google Account you were using before. If you have any questions or concerns before performing the reset, or if doing so does not resolve the issue, please let me know so I can continue to investigate. 

Update From HTC

hit the 'back' (physical) button on your phone when it asks you to log in. The screen should then show the 'loading' screen, now quickly press the 'menu' button and select 'accounts'. You have to do this very quickly. Then you should be able to select the account you want to use and log in using the correct details.

You do not need to clear the cache in the Market for this to work. If you have any other questions or concerns, please feel free to email us.