SP2010 Beta 2: Access Denied when accessing My Content

Problem:
When trying to access My Content section in MySite in SharePoint 2010 Beta 2, you get error:

There has been an error creating the personal site. Contact your site administrator for more information

Furthermore, you get these errors in Application Event Log:

Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Foundation
Date: 11.1.2010 12:54:21
Event ID: 6141
Task Category: Topology
Level: Error
Keywords:
User: DOMAIN\SPFarmAdminAccount
Computer: mycomputer.domain.com
Description:
The site /my/personal/palojus could not be created. The following exception occurred: Access denied..

and

Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Portal Server
Date: 11.1.2010 12:54:21
Event ID: 5187
Task Category: Administration
Level: Error
Keywords:
User: DOMAIN\palojus
Computer: mycomputer.domain.com
Description:
My Site creation failure for user 'domain\palojus' for site url 'http://communities.domain.com/my/personal/palojus'. The exception was: Microsoft.Office.Server.UserProfiles.PersonalSiteCreateException: A failure was encountered while attempting to create the site. ---> System.Security.SecurityException: Access denied.
at Microsoft.SharePoint.Administration.SPPersistedObject.BaseUpdate()
at Microsoft.SharePoint.Administration.SPJobDefinition.Update()
at Microsoft.SharePoint.Taxonomy.TaxonomyFeatureReceiver.EnsureHiddenListFullSyncTimerJob(SPWebApplication webApplication)
at Microsoft.SharePoint.Taxonomy.TaxonomyFeatureReceiver.FeatureActivated(SPFeatureReceiverProperties properties)
at Microsoft.SharePoint.SPFeature.DoActivationCallout(Boolean fActivate, Boolean fForce)
at Microsoft.SharePoint.SPFeature.Activate(SPSite siteParent, SPWeb webParent, SPFeaturePropertyCollection props, Boolean fForce)
at Microsoft.SharePoint.SPFeatureCollection.AddInternal(SPFeatureDefinition featdef, Version version, SPFeaturePropertyCollection properties, Boolean force, Boolean fMarkOnly)
at Microsoft.SharePoint.SPTemplateAssociationElement.EnsureTemplateAssociatedSiteFeaturesActivated(SPSite site, String sTemplateName)
at Microsoft.SharePoint.SPFeatureManager.<>c__DisplayClass16.
...
The Zone of the assembly that failed was:
MyComputer
...

Thoughts:
1. Granting direct access to the user (in addition to obviously already having access via NT AUTHORITY\Authenticated Users) didn't have any effect.


2. Verifying My Site Settings (Central Administration --> Manage Profile Service --> User Profile Service Application --> My Site Settings --> Setup My Sites) didn't have any effect, as the settings were already correct.

Solution:
In My Site Settings (Central Administration --> Manage Profile Service --> User Profile Service Application --> My Site Settings --> Setup My Sites), I changed My Site Host slightly (".../my/" to ".../my2/").


Then I tried accessing My Content again, and My Site was created successfully. Finally I changed My Site Host back to original value and got some flash-backs from the good old MOSS times when many things didn't work, and suddenly they just started to work. Some things never change.