when thunderbird opens, and several times through the day, the program will hang for minutes at a time. This can be simply downloading new mail or opening an old mail There is a long list of "unknown property mso-style-type" and "unknown descriptor panose-1" which coincide with the long slow periods I'm running windows 8, thunderbird 24.6.0 and mcafee livesafe livesafe appears to make no difference i only receive errors in one email profile. could there be a problem with the profile itself?