Gmail stuck on "Waiting for sync" My Gmail app recently stopped working.  I'm on a SGS Captivate running this custom ROM -- while I realize there might be some ROM-specific glitch, I thought I could ask here for general troubleshooting tips.  I stopped getting new emails last week, so I cleared the app cache, toggled sync off and back on, then finally uninstalled and re-installed the app.  Nothing seems to make any difference -- mail will not sync, sitting at the "Waiting for sync" message with a blue spinner for hours.  Am I missing anything?  Is there any way to get a handle on what exactly is going wrong here?
This question is rather ROM specific.  

In fact the custom ROM post even says it's a "New Beta from vibraturk". If you want to continue using this beta ROM, please search the linked thread or ask the creator for for more specific help on his ROM.

You might want to consider a more "established" ROM like CyanogenMod for Captivate, there are even CM9/ICS nightlies already.