Been having an issue and I'm not sure that it is CM7 related or not, but I did not have this issue before I flashed CM7...
I've noticed that, a lot of times, texts are not coming through. I have had a significant number of times where someone has sent me several texts and I have not gotten them. It's weird because it isn't consistent. I could be having a conversation with someone and then suddenly not get any texts. At first I assumed they just stopped texting me, but discovered that they sent me several texts that I just did not get. Also I discovered on Monday that some of my texts are not going out, even though Handcent tells me they did. I thought it might be Handcent, but I checked the stock messaging app and these texts are not there either. Also, sometimes phone calls are affected in a similar manner. Either I get a voicemail from a call I never knew was coming in, or the phone will ring but the screen is black and I can't accept the call or do anything really until the call ends and the phone starts responding again. But by that time it is too late. I called out of work on Monday by texting my manager. I thought everything was fine until a friend of mine texted me and told me that our manager called them to see where I was, as I did not show up for the shift, and no one received any messages or calls from me, and I didn't answer the phone when they call me... Even though I thought that I had texted them just fine.