So I just downloaded New Multi-Carrier CHT SharkieROM v1.1 from the VBNFiles link in the 1st post and Twitter works fine...
I'm not sure what's going on on your end
When you have time, can you list what all you've added to the ROM? What mods and .cabs you've installed?
As much as it might suck for you, I would redownload and reflash that ROM and see what happens...
After you do that, test Twitter out first, then start adding your stuff and test after each thing.
Or... Just hard reset and test. Then add and test, add and test etc...
On a side note to everyone,
The multi-carrier CHT ROM says "New" in front because I removed the Lockscreen enhancement from it. That ROM has the standard WM lockscreen. I think it works better (buttons respond quicker thereby causing less input errors) and looks better because it allows you to see your wallpaper in the passcode screen. The buttons aren't may fav though. Maybe I'll make my own...