Have you installed or updated any other software lately?

Cheers.

Might have been a couple new GPUGRID, thought it was SETI because they hit computation errors during the graphics card driver failures. But, seems to be running the SETI fine right now.

Have you installed or updated any other software lately?

Cheers.

THANKS ALL!
I followed all advices and made it work!

I did some testing and found that the optimal is:
On my EVGA GeForce GT630 1GB on Intel E5400 2.7 (2):
3 tasks on GPU + 2 on CPU: 92% GPU load, 800mbGPU used 69C
From initial:
1 tasks on GPU + 2 on CPU: 73% GPU load 450mbGPU used

With:
<app_config>

<app>
<name>setiathome_enhanced</name>
<max_concurrent>5</max_concurrent>
<gpu_versions>
<gpu_usage>0.33</gpu_usage>
<cpu_usage>0.2</cpu_usage>
</gpu_versions>
</app>

<app>
<name>astropulse_v6</name>
<max_concurrent>1</max_concurrent>
<gpu_versions>
<gpu_usage>0.33</gpu_usage>
<cpu_usage>0.2</cpu_usage>
</gpu_versions>
</app>

</app_config>