I was forced to move away from TB portable months ago because it kept crashing my system (Win7 64) every time I received mail (sometimes if there were only a couple of emails retrieved it would crash to blue screen when I tried to view the retrieved emails). Seems to have been a common problem as there was a lot about this happening on the net. Couldn't find any solution to stop it crashing. Moved to DreamMail which worked well. Now the European support site for DreamMail is closing up. They haven't been able to contact the Chinese author for a year and a security vulnerability has been found. So they are recommending changing software. Having just got a new laptop (Win8 64) I decided to test Thunderbird again. Completely fresh install. Set up an account. Retrieve mail. Immediately crashes to blue screen. Tried SeaMonkey as well. Same thing. No solution found via Google search.
As most new systems are shipping with 64-bit OS is anybody using TB Portable successully on a 64 bit OS? If so, have you had crashes? And how did you get it to stop crashing?