Does anyone have a list of coins where soloing is known to be broken? Maybe one with low diff? 
SecureCoin (SRC) was suggested. It is a Quark coin. Another miner posted that it has the same error message on finding a block (crashing) as VertCoin (VTC). CCminer will generate Quark hash with SRC; SRC has very rapid blocks at low difficulty.
Currently, I do not think solo-mining will work with any algo using CCminer.
That's in part why I am rather unhappy about the situation. myself and other have busted our asses on ccminer while the most publicised version which mostly uses the code we developed gets broken on a daily basis, feature gets removed, not even possible to run in debug mod without recompiling etc...).
no offence sp, it is time you get your shit together and stop releasing 4 untested releases a day...
PRECISE--
OK, you have a point, DJ. I was posting in sp_'s thread, however. I DO try to be clear about OS, version, hash rates, clock rates, spelling and punctuation, etc. I've groaned about the bleeding edge speed before, myself, but sp_ has brought my 750ti cards from 5.5+ Mh/s to 6.1Mh/s mining Quark within the last 20 releases.
Maybe a few releases should focus on code clean-up and standardization rather than speed. Future improvements would then be on a stronger base. --scryptr
Considering DJM doesn't release anything, he doesn't really offer an alternative. I'd rather take a buggy and sometimes glitchy version with speed over one that's getting steamrolled by the private miners (usually released by the same person).
Also, everyone is getting their panties in a knot about solo mining. Who even solo mines now days? Only people who do have to have a relatively large farm for that to actually work (on the profitable coins). Perhaps consider charging them for a solo mining version. The amount of shits I have for this issue are about 0 as it is I'm sure for the majority of miners as we're all on pools... because, you know, we can't magic 5% of the network hashrate out of our asses.
Seems as though people are on SP's balls because profits are tight and he's offering a open source-public miner, which hurts the private miner business. For instance, DJM's toted L2V2 rewrite isn't even worthwhile anymore compared to Quark or other alternatives.
On the other hand solomining is important for small miners : this allow us to benefit from recently launched coins or low profiles ones, often more profitable. Moreover, ethereum (rather shift, exp which have lower difficulties) mining is more profitable in solo, due to very fast blocks which penalized pools mining if you have not low latency network between your rig and the pool.