I've found no significant difference in curve shape or CI with many films processed in D-76H at 25C compared to 20C. However, it's been noted that TMY tends to have an upswept curve shape when developed at high temperatures; this probably happens with other films too but none I'm using. Those films include HP5+, Delta 100 and Delta 3200. I haven't generated enough info on TMX to address that aspect.(posted 8489 days ago)I prefer to not develop film at such high temperatures if I can avoid it because of the increased graininess; I prefer 24C and lower, down to 20C.