OurVoteLive.org is a site developed by the good folks at the Electronic Frontier Foundation in San Francisco that tracks reports of voter complaints all across the country and is sortable by state and county.
As of 11:30 a.m. today, Texas had 214 complaints. 103 of them had to do with registration problems. For the complete list and county map, see:
Bexar County had 58 inquiries and 15 problems, see:
Voters experiencing problems of any kind are encouraged not to leave their polling station and to immediately report those problems to the site's toll free voter assistance hotline at 866-OUR-VOTE. The hotline is staffed by legal experts that can help people determine their voting rights.